Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d77742fe12a048b…

MALICIOUS

PDF

72.6 KB Created: 2021-02-22 20:54:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6e728d262f694120ed9da0c9a01d0f34 SHA-1: a334003d6f5c02b285c8fcfb2a77d5c37fa932a0 SHA-256: 7d77742fe12a048b43beecd7459b6179fcacacac630103590d67a35ed4396f4a
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a tactic to drive traffic to potentially malicious sites. The embedded URL 'https://seumenha.ru/strik?utm_term=what+age+can+a+person+draw+medicare' is likely part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://seumenha.ru/strik?utm_term=what+age+can+a+person+draw+medicare PDF link annotation
    • https://cdn.sqhk.co/wejewenu/onieidg/vevovokibujowotax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_6022b3e8e0aec.pdfIn PDF document text
    • https://cdn.sqhk.co/novitovikor/3Ccgtjd/lixumewaw.pdfIn PDF document text
    • https://cdn.sqhk.co/botuvawezej/bSLiiic/nuforefubi.pdfIn PDF document text
    • https://mitukuruzatag.weebly.com/uploads/1/3/5/3/135346955/didigexufo-tetad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426418/normal_5fe043ad1052a.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuronufepu/ajaaPgf/14325436404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387922/normal_6015697048cac.pdfIn PDF document text
    • https://kiluzamomumu.weebly.com/uploads/1/3/5/3/135344913/mulekufivigupa-tatirag.pdfIn PDF document text
    • https://cdn.sqhk.co/jenojigise/V4ggifJ/50_15_in_simplest_form.pdfIn PDF document text
    • https://cdn.sqhk.co/mozulunilex/YjaP3jh/36587159776.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/3Zjfe2H/61963590828.pdfIn PDF document text
    • https://likimipezerejo.weebly.com/uploads/1/3/2/6/132682052/9490487.pdfIn PDF document text
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/d66e09f9.pdfIn PDF document text
    • https://cdn.sqhk.co/gurudulep/Zjchggc/gun_gang_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485799/normal_5fe9aa3de6f50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459780/normal_5fd235be02fe7.pdfIn PDF document text
    • https://cdn.sqhk.co/musutalivun/sjjLMR1/amazon_apple_tablet_charger.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0C 5560 bytes
SHA-256: 3859a18f4de28b7e46b155eb3076e0eacc265c49343ac901793e339268a8eb9f
font_01_sfnt_off0000f1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EA 10364 bytes
SHA-256: 773a291a4e002f44226b9b7ce2c7d8504d76e2b4d8f2758e47016da73aa04da7

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