Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8f4b081f64c7a6…

MALICIOUS

PDF

249.8 KB Created: 2022-05-30 19:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 0eae59df60657eaa380adc4e6ef20150 SHA-1: 77dd820419148dd450a1e8c65b1e93bce0fadf39 SHA-256: 9e8f4b081f64c7a6d2665b4983176d320f3c79663233a86809267f35fa127995
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains embedded JavaScript and multiple external URIs, including one that impersonates Walmart for credential phishing. The document also utilizes SEO redirectors and links to compromised WordPress upload storage, indicating a multi-stage lure designed to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7783

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xepejazodaka.weebly.com/uploads/1/4/1/4/141419330/4333617.pdf.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://colod.co.za/XSRYdR1H?utm_term=carbon+dating+math+worksheet+answers+pdf+free+edition+free PDF link annotation
    • http://bibikid.ru/upload/18792792257.pdfIn PDF document text
    • https://xepejazodaka.weebly.com/uploads/1/4/1/4/141419330/4333617.pdfIn PDF document text
    • https://www.liad-alger.fr/admin/style/js/edit/kcfinder/..%5Cimages%5Ccontenue/files/vesobafomusoweze.pdfIn PDF document text
    • http://mms.vru.ac.th/kcfinder/upload_new/files/71370151222.pdfIn PDF document text
    • http://biblebaptist.kr/user_data/kcfinder/files/jumizupalapajelalu.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/rolixa.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/rebuzejiwiwos.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1626a3bb2209e8---bulozuxa.pdfIn PDF document text
    • http://rostocker-taxi.de/resources/files/56317572703.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/julejamuvozik.pdfIn PDF document text
    • https://buwikuzajow.weebly.com/uploads/1/3/7/5/137501860/kojologud.pdfIn PDF document text
    • https://pupalajapifev.weebly.com/uploads/1/3/1/4/131454396/bewabanorok-pakatumavuwop-kujufejusozo.pdfIn PDF document text
    • https://lawebigatu.weebly.com/uploads/1/3/1/4/131453175/9f00b.pdfIn PDF document text
    • http://www.snhram.ru/kcfinder/upload/files/legil.pdfIn PDF document text
    • https://dunewalowipeli.weebly.com/uploads/1/3/1/8/131856746/kekiwifuxupuwawalo.pdfIn PDF document text
    • http://eminenceinc.com/userfiles/file/76698939643.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/vofewesunupabasumobire.pdfIn PDF document text
    • https://finest.ccmgs.it/docs/file/gugixokiwiziz.pdfIn PDF document text
    • https://tadurefejixuset.weebly.com/uploads/1/3/4/4/134498676/655611.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1623719344e566---72865394680.pdfIn PDF document text
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/73544366477.pdfIn PDF document text
    • http://www.brett.ro/fisiere/file/tekimomuvexowomesedevir.pdfIn PDF document text
    • http://www.lacalzadadeoropesa.es/abm/Bibliotecas/kcfinder/upload/files/subusozuku.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/fovenadokumepezawoturu.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/jaxusitekumunekez.pdfIn PDF document text
    • https://gunasufipew.weebly.com/uploads/1/3/4/6/134692007/sarowep.pdfIn PDF document text
    • https://rubfila.in/files/file/66919753738.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/17embtfdl13t3rsfu98mnmg606/29084997089.pdfIn PDF document text
    • https://basopuseg.weebly.com/uploads/1/3/4/7/134703880/makamipisexijewaf.pdfIn PDF document text
    • http://proallprint.com/userfiles/files/72322431623.pdfIn PDF document text
    • https://sazojowob.weebly.com/uploads/1/3/4/3/134351878/6bdfe615d4.pdfIn PDF document text
    • https://bezesigut.weebly.com/uploads/1/3/2/6/132681157/4232410.pdfIn PDF document text
    • https://lenujabomixus.weebly.com/uploads/1/4/1/7/141797213/14b99bea6.pdfIn PDF document text
    • https://fogufapepupol.weebly.com/uploads/1/3/1/8/131871477/587726d0b21.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000375e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x375E7 11248 bytes
SHA-256: 15d828d80437901881366b730efd17409e8172bb1b0e4ba633dbdfa0eba25ddc
font_01_sfnt_off00038fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38FC4 17960 bytes
SHA-256: 44758c3c376ece3f373fb2cba8c8a624a392b79450ca2f8a1cd5870f2d3148ab
font_02_sfnt_off0003bf4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BF4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1