Malicious PDF — malware analysis report

Static analysis result for SHA-256 936506dd8c7a0d47…

MALICIOUS

PDF

75.6 KB Created: 2021-05-27 21:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6a68323ab4a9569cebe0b49f44fa3dcd SHA-1: c9fa64eb0bbfe90f71fe87aae8973c68368aa9f1 SHA-256: 936506dd8c7a0d477b7da3722b5d83f06e2fb36cc7902361c9175edf913d7ca1
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://ponafet.ru/strik?utm_term=where+does+bone+growth+repair+and+remodeling+occur PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403959/normal_6030262737b2c.pdfIn PDF document text
    • https://gazukevofuw.weebly.com/uploads/1/3/4/5/134597640/5645224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422371/normal_6031820c2a5e4.pdfIn PDF document text
    • https://kekidebas.weebly.com/uploads/1/3/4/6/134633427/a0010bccc1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409123/normal_5ffc67ccafec5.pdfIn PDF document text
    • https://dizarikovir.weebly.com/uploads/1/3/4/6/134627165/0c46176697b80a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528260/normal_6062bde7cbf26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472793/normal_5ff1e02ec1301.pdfIn PDF document text
    • https://jakidanumamew.weebly.com/uploads/1/3/4/8/134881834/5343630.pdfIn PDF document text
    • https://basopuseg.weebly.com/uploads/1/3/4/7/134703880/26a1479.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479435/normal_5feb3097c5da8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484999/normal_5ffed3529be98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414514/normal_5fdd8fbeb1964.pdfIn PDF document text
    • https://finukapaxareb.weebly.com/uploads/1/3/4/4/134494590/tebuve.pdfIn PDF document text
    • https://donixefafara.weebly.com/uploads/1/3/4/3/134310569/eeb3b70d26e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402963/normal_5ffa14d54ba8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443602/normal_5fd678d68489f.pdfIn PDF document text
    • https://xirabefutabo.weebly.com/uploads/1/3/5/3/135323672/7d806abb6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dc23e21-d1dd-4626-adcc-99bfc9bb4d72/wamaxoletoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/073d7639-9f42-41dd-9ae8-3f13b6fa043d/75547037355.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_off0000e6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B8 5732 bytes
SHA-256: 6057c81fc58e1d460d003482384e3dbd7ca83632fd8653b2e0b0e3dc86d5cadd
font_01_sfnt_off0000fa2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2E 11360 bytes
SHA-256: b573feeb73f1bf0ef63dd9969c5928ec0beb7236857ed78d7d9b6ccd4c8b4734

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