Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd6c91a211f967a…

MALICIOUS

PDF

72.5 KB Created: 2021-04-01 06:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ef72681e4b47cfd2920f9f4abbf3e780 SHA-1: 5fa3d967c4994a82e18fb97bcc4b03e7207bd5f0 SHA-256: afd6c91a211f967a8a1006af033be806806d687bda31042130b9c430fe9c94cb
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 0.9998

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
  • 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://leonvi.ru/strik?utm_term=what+is+the+impossible+burger+made+of+burger+king PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473384/normal_6013ba4ff2f26.pdfIn PDF document text
    • http://pijakonojimuw.iblogger.org/37361392159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484359/normal_6023fc774d8c6.pdfIn PDF document text
    • https://teniroge.weebly.com/uploads/1/3/4/6/134693228/wabakajupokexu_gojeluwimugixo_zagor_mozoj.pdfIn PDF document text
    • https://xinagaxigivawiv.weebly.com/uploads/1/3/0/7/130739766/c052c56b680d.pdfIn PDF document text
    • http://yognat.space/14053626021f3z3n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501231/normal_604f4df922eed.pdfIn PDF document text
    • https://torosiwetub.weebly.com/uploads/1/3/5/3/135351177/9498527.pdfIn PDF document text
    • https://kaxusumolen.weebly.com/uploads/1/3/4/5/134597517/9418559.pdfIn PDF document text
    • http://hocostyle.ru/pimibulelanevav5bp7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454671/normal_60313658a7db3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391015/normal_60223136f36c3.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/vidadaviwal/44873344195.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/xanog.pdfIn PDF document text
    • http://diruxepuf.epizy.com/alcoholismo_corto.pdfIn PDF document text
    • http://tadudaxejede.epizy.com/38393601051.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/19322494863.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/waterproof_crib_sheet_protector.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/86260766939.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/basketball_games_online_free_no.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD49 5672 bytes
SHA-256: 382b2c89f5f2b5e068e8cfe5e1a2e64b2e723fb639c871f3b024683287fbbc39
font_01_sfnt_off0000f06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06E 10736 bytes
SHA-256: bc947c65a6a7e632be2afa6703458a4fc07644b78b84d2c35855cc96467cf9b0

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