Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d97ee4ed64b1c8f…

MALICIOUS

PDF

76.5 KB Created: 2020-11-25 18:18:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a9ae9a4652f0834538c3ce1616f4ca32 SHA-1: de39be3b95051464bcc6293cc50080fb702f5bd9 SHA-256: 7d97ee4ed64b1c8f54edf43dfe071e8629da1c755a4067dc05f359de24ea99c9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffset.ru/strik?utm_term=svs+pb12-nsd+vs+pb1000 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481841/normal_5fbb98d31fab0.pdfIn PDF document text
    • https://xiwaxodo.weebly.com/uploads/1/3/4/3/134319271/4035909.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/metakibeme/xidudatubewugo.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/25948726407.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/the_atronach_stone.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/ahriman_omnibus.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/33639105964.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/pamazulizitikuseva.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/parallel_perpendicular_or_neither_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/purium_flex_meals.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD588 4708 bytes
SHA-256: 4bbec69d76c53e45d13624b952576d432f06242994aafe602345d25f07a6693f
font_01_sfnt_off0000e583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE583 15604 bytes
SHA-256: cf442b9561e541fdbadfc436241b5a4bc69ebd1d57835d615cd9e9e6916058eb
font_02_sfnt_off000115b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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