Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2cf341d6e11995…

MALICIOUS

PDF

68.9 KB Created: 2020-12-17 15:22:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ff414ea5c31c4fc65035e0e961e74b98 SHA-1: d730f7e7f22b599bfd9e083ffbdcbb7b61d54d7e SHA-256: 7b2cf341d6e11995441e8be1c5ad640c72af3d166618ab07917070d01d2d9f9b
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The file also contains a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. While no scripts were extracted, the presence of malicious redirector links and the overall structure indicate an attempt to lead users to harmful content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=rock+slide+engineering+ac-tb-200+tailgate+table In PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/8af63683efc2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367640/normal_5fad79f046223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f8716ebcdd90.pdfIn PDF document text
    • https://jefifekelu.weebly.com/uploads/1/3/4/7/134744422/totewabuvabog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0f1b0084698658e5e73ac/t/5fd0b24a2817830411287672/1607512651653/vonetuwoxutoginedur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17b60d9b-f917-4249-949d-92dd438cbb5b/kafojukupipowokew.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1c904b66d17947f91203/1606229140745/dawizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf96f45-1524-4dda-b4c3-0d4c5c8d021e/rabevasizidivawux.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65777e9fc3622d5470b25/t/5fd71b2a481cfa31ade041cd/1607932716289/rabijuxonuji.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc588525bcb0228a2a1f2c3/t/5fc87967b74dd54858da35a5/1606973800280/tevemuduzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4841cc9e-ebf8-47fe-963d-cece475e5e56/inception_hindi_google_docs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ba74263-926b-4d2f-896d-106e6cb738b6/lopazuzifasanugo.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF7 5624 bytes
SHA-256: 3ca98c872cb4176a7f597e5f1055540514fd3553d9e571e1fc01c4c5e2966405
font_01_sfnt_off0000df2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2C 10952 bytes
SHA-256: 388947e4b129a9481d3f54a923a451da2f7eb6dda09e87e113b58bd1a7938286

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