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
104 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains embedded JavaScript and external URIs, indicating an attempt to deliver malicious content. The primary URL, https://colod.co.za/XSRYdR1H?utm_term=carbon+dating+math+worksheet+answers+pdf+free+edition+free, is presented as a worksheet download, which is a common social engineering tactic. ClamAV and ML classifiers confirm the malicious nature of the file, likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7783

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
    • http://bibikid.ru/upload/18792792257.pdf
    • https://xepejazodaka.weebly.com/uploads/1/4/1/4/141419330/4333617.pdf
    • https://www.liad-alger.fr/admin/style/js/edit/kcfinder/..%5Cimages%5Ccontenue/files/vesobafomusoweze.pdf
    • http://mms.vru.ac.th/kcfinder/upload_new/files/71370151222.pdf
    • http://biblebaptist.kr/user_data/kcfinder/files/jumizupalapajelalu.pdf
    • http://letresorellebio.it/userfiles/files/rolixa.pdf
    • https://takarasushimn.com/userfiles/files/rebuzejiwiwos.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1626a3bb2209e8---bulozuxa.pdf
    • http://rostocker-taxi.de/resources/files/56317572703.pdf
    • http://www.pethouse.es/ckfinder/userfiles/files/julejamuvozik.pdf
    • https://buwikuzajow.weebly.com/uploads/1/3/7/5/137501860/kojologud.pdf
    • https://pupalajapifev.weebly.com/uploads/1/3/1/4/131454396/bewabanorok-pakatumavuwop-kujufejusozo.pdf
    • https://lawebigatu.weebly.com/uploads/1/3/1/4/131453175/9f00b.pdf
    • http://www.snhram.ru/kcfinder/upload/files/legil.pdf
    • https://dunewalowipeli.weebly.com/uploads/1/3/1/8/131856746/kekiwifuxupuwawalo.pdf
    • http://eminenceinc.com/userfiles/file/76698939643.pdf
    • http://testplanet.nl/uploads/files/vofewesunupabasumobire.pdf
    • https://finest.ccmgs.it/docs/file/gugixokiwiziz.pdf
    • https://tadurefejixuset.weebly.com/uploads/1/3/4/4/134498676/655611.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1623719344e566---72865394680.pdf
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/73544366477.pdf
    • http://www.brett.ro/fisiere/file/tekimomuvexowomesedevir.pdf
    • http://www.lacalzadadeoropesa.es/abm/Bibliotecas/kcfinder/upload/files/subusozuku.pdf
    • https://vegas-shop.net/uploads/files/fovenadokumepezawoturu.pdf
    • http://ig-einheitsloks.de/medien/file/jaxusitekumunekez.pdf
    • https://gunasufipew.weebly.com/uploads/1/3/4/6/134692007/sarowep.pdf
    • https://rubfila.in/files/file/66919753738.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/17embtfdl13t3rsfu98mnmg606/29084997089.pdf
    • https://basopuseg.weebly.com/uploads/1/3/4/7/134703880/makamipisexijewaf.pdf
    • http://proallprint.com/userfiles/files/72322431623.pdf
    • https://sazojowob.weebly.com/uploads/1/3/4/3/134351878/6bdfe615d4.pdf
    • https://bezesigut.weebly.com/uploads/1/3/2/6/132681157/4232410.pdf
    • https://lenujabomixus.weebly.com/uploads/1/4/1/7/141797213/14b99bea6.pdf
    • https://fogufapepupol.weebly.com/uploads/1/3/1/8/131871477/587726d0b21.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

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