Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd02bd9f722d7b8…

MALICIOUS

PDF

86.9 KB Created: 2021-09-15 20:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 58176a94d400c7d20715c67c5f1a063c SHA-1: 0a5bf1cb6352d9ff39e3e7b2e33e51fc289cb604 SHA-256: 1bd02bd9f722d7b87f1d71bff21d83467b5933ad7411dbef912d03403fd905cc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://hrmconsulting.biz/upload/files/27342666998.pdf In PDF document text
    • https://menu2uplus.com/images/file/ruvuvovuvifawozoxe.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/19843988776.pdfIn PDF document text
    • http://techbis.pl/files/file/70263982576.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/vubadevewesigi.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/risuzadigesomuxe.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/32670764627.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/movefuga.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6927092fe---butuzevapalogivamiwebot.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/16957905553.pdfIn PDF document text
    • https://jocafoto.com/fotos/file/93386684200.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/gutabovaw.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/ramixutolizewefogo.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16141f9d2c5398---vizapu.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/e4ad44df22d4a46db19010a1c81542f5/64223697493.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/mazefowas.pdfIn PDF document text
    • https://equimat-cheval.fr/file/xitajusokoganaxob.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/86190465007.pdfIn PDF document text
    • https://allcondosales.rodeodrivecondosale.com/userfiles/files/wapixifegegifone.pdfIn PDF document text
    • http://pieseclimaauto.com/files/file/37351718342.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/64863053937.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/20630068341.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/78441625287.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/72387103059.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/39163346909.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=android+auto+disconnectsPDF link annotation
    • 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_off0000eea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA8 10400 bytes
SHA-256: 096e656a92f98725bb34bbcd806c4b254bd3f369c5cb38be97910b4610c392ea
font_01_sfnt_off0001065c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065C 18520 bytes
SHA-256: 097237766aade6788857c1906c5ab73fcfb97a686a3fba0a70f3d2de57045787
font_02_sfnt_off00013656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13656 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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