Malicious PDF — malware analysis report

Static analysis result for SHA-256 2614fc8ad884b955…

MALICIOUS

PDF

71.1 KB Created: 2021-03-06 14:37:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 01c96324128c651e7a14a902c95f18ce SHA-1: 20cf7914653a4e4cbe249ed212bc6f564ae0ad0b SHA-256: 2614fc8ad884b955630425595138bbfce485f47306c04ed38f4f3d4c8240ba20
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing unwanted software. Although no scripts were directly extracted, the presence of external URLs points to the document's role in directing users to potentially harmful content.

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://zajinet.ru/wix?keyword=djay+2+apk+free+download PDF link annotation
    • https://cdn.sqhk.co/kajurineg/gEHe5ll/skateboard_tricks_to_learn_on_grass.pdfIn PDF document text
    • http://voztrans.ru/20530622374vti9k.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/9R7pX2M/nulepatotidebun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386842/normal_5fc72ee27a58e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499942/normal_5fcb48d776cba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443354/normal_5ff863d6cfa2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478141/normal_6009a8972b6f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368481/normal_5fcd812898b8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404757/normal_602a1803c3db4.pdfIn PDF document text
    • https://zazibarem.weebly.com/uploads/1/3/0/7/130775746/nabenotojonuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480745/normal_603b931ccb929.pdfIn PDF document text
    • http://autokenn.com/cholesterol_guidelines_20134spvm.pdfIn PDF document text
    • https://lizoduloto.weebly.com/uploads/1/3/4/7/134701777/guxuge.pdfIn PDF document text
    • http://inertbhjbj.ru/xelekomigakutaawepu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_0c190e2c2d1c4f7cb80c9f1e59487acd.pdf?index=trueIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_86d6496b4171423cb5826a86f63a3a56.pdf?index=trueIn 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_off0000da79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA79 5320 bytes
SHA-256: 862430ea6798b6b1254ca6ed10cafadf6b4ef4210498429bb16de2a59129eb25
font_01_sfnt_off0000ecd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD2 10220 bytes
SHA-256: ec029522e0082dbf077cd94a1840e832c004c37932d740dbc20b7bfd47012ae2

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