Malicious PDF — malware analysis report

Static analysis result for SHA-256 8779951a03a5b0fe…

MALICIOUS

PDF

86.6 KB Created: 2021-01-21 12:30:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d406969727f4fd57eb95a660efb07b90 SHA-1: 6864b5d8c58ec3291e237fde8c012b151a483e67 SHA-256: 8779951a03a5b0fe5fec09b258adf518bc02f9373021a026be400d50d73d32c3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9528

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://seumenha.ru/aws?utm_term=gigabyte+z370+aorus+gaming+7+manual PDF link annotation
    • https://cdn.sqhk.co/sikibeve/ypjdWAr/zombie_apocalypse_birthday_party_game_ideas.pdfIn PDF document text
    • https://pigiwikabulate.weebly.com/uploads/1/3/1/8/131856715/surijujoto.pdfIn PDF document text
    • https://cdn.sqhk.co/musezikuzapi/fhdge0E/41686882009.pdfIn PDF document text
    • https://site-1166647.mozfiles.com/files/1166647/73094975704.pdfIn PDF document text
    • https://cdn.sqhk.co/mudaxomemut/pjiYgd3/jexigidexidesakuropok.pdfIn PDF document text
    • https://site-1172329.mozfiles.com/files/1172329/bosaf.pdfIn PDF document text
    • https://site-1172834.mozfiles.com/files/1172834/26218934401.pdfIn PDF document text
    • https://site-1237297.mozfiles.com/files/1237297/69041809127.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/905419.pdfIn PDF document text
    • https://vubibawijov.weebly.com/uploads/1/3/0/7/130776162/dajori.pdfIn PDF document text
    • https://site-1175435.mozfiles.com/files/1175435/nuvupodifek.pdfIn PDF document text
    • https://cdn.sqhk.co/fenogate/dgfthah/xidinetefobe.pdfIn PDF document text
    • https://site-1178527.mozfiles.com/files/1178527/35562097645.pdfIn PDF document text
    • https://site-1173408.mozfiles.com/files/1173408/catalogo_mary_kay_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/advanced_investment_appraisal_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/29210621860.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/uc_browser_for_java_free_phoneky.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/zigolubujutifu.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/chashme_ka_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/rakojulewizijixetonozaxak.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/pamegeravu.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12897 5716 bytes
SHA-256: 7c8e977a586906771a50b68fc679909721f269ddefea7ed68bd66be549a72c29

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