Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f331560728310d…

MALICIOUS

PDF

90.6 KB Created: 2020-12-13 21:02:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 450d4f83ffec3485f317ad0b44e82325 SHA-1: d13d57aed5802e3ab02cda340337a087214c7760 SHA-256: 92f331560728310d17b2e230f4ab46b622322f475b0e5de3195d9afff0b8406b
164 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. It uses an urgency-based lure. 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 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffnew.ru/strik?utm_term=gurps+character+sheet+excel PDF link annotation
    • https://zopojidiluze.weebly.com/uploads/1/3/4/3/134361294/9c107022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391013/normal_5f9b96906c7c0.pdfIn PDF document text
    • https://sujofunipus.weebly.com/uploads/1/3/4/5/134502209/9541060.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/5fbce344be7cfc36344e8aaf/t/5fbdf0681972c46e3c644c49/1606283368998/how_to_beat_iudex_gundyr.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/wusthof_steakhouse_knife_set.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/software_application_developer_information.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c3d560f2895dc1e72903/t/5fceb0480d4311364642192d/1607381065094/pumuxamal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f6bd5687f52b6b817d01/t/5fc1b85df8cdb769c623d58e/1606531165483/taxesawaluvedaj.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/jofodiguz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10751bdb33045eec30316/t/5fc4ea444f9837572079465e/1606740549077/char_broil_big_easy_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/53067871802.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc116c5bdb33045eec368a4/t/5fc13b689d79364840ba764e/1606499176564/last_war_of_the_world-island.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_off000126c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C4 5120 bytes
SHA-256: 79ca3e3131fec93b1b1f34e8fbb6bd14153be05cb8a5e7c0953ef2d8856e528f
font_01_sfnt_off00013832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13832 11012 bytes
SHA-256: e1713f009f05f5d57b28043f675b32a889d8b3ab283feefa6676f7d123861ec3

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