Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab9705a7e3d8256…

MALICIOUS

PDF

71.7 KB Created: 2021-06-14 07:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37d9570e27be2d89f486f31609019084 SHA-1: e3ffa18b5d577ec555d35edc18be2ecfa31dfcdd SHA-256: 6ab9705a7e3d82560ac03f64ee82ba2a7a5ef321d1cc6513c46f6ee508010586
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDF files, indicating a link farm or content distribution network. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://huntic.ru/pbw?utm_term=satisfya+aish+song+download+mp3+320kbps+pagalworld
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/81b1c.pdf
    • https://nuvuxupu.weebly.com/uploads/1/3/4/5/134507381/mogefusija.pdf
    • https://norotenivepele.weebly.com/uploads/1/3/4/0/134042349/namibeposes.pdf
    • https://cdn-cms.f-static.net/uploads/4369316/normal_60636f53235a4.pdf
    • https://static.s123-cdn-static.com/uploads/4426679/normal_5fc56c8e36364.pdf
    • https://luzidasagozoro.weebly.com/uploads/1/3/4/3/134319964/8887171.pdf
    • https://biwaxosele.weebly.com/uploads/1/3/1/4/131437294/8485338.pdf
    • https://cdn-cms.f-static.net/uploads/4450036/normal_606e7c40267c3.pdf
    • https://cdn-cms.f-static.net/uploads/4459055/normal_6048410660c6c.pdf
    • https://cdn-cms.f-static.net/uploads/4454286/normal_602255543a57c.pdf
    • https://cdn-cms.f-static.net/uploads/4446490/normal_601f6ae425b5d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nukosazizari.pbworks.com/w/file/fetch/145170708/wanojegolibarawig.pdf
    • http://furalagaposu.pbworks.com/w/file/fetch/144674301/xegavelurolanukozawor.pdf
    • http://fadoposapat.pbworks.com/w/file/fetch/144476691/what_are_some_british_cuss_words.pdf
    • http://jitijaloj.pbworks.com/f/gefafarur.pdf
    • https://uploads.strikinglycdn.com/files/22764d2c-250c-4a61-be34-1bb7e434be91/how_to_find_stock_for_day_trading.pdf
    • https://uploads.strikinglycdn.com/files/9dccc497-9aa7-4f76-a86d-6e398b15f01c/shimano_alfine_8_speed_hub_gear_review.pdf
    • https://uploads.strikinglycdn.com/files/88e0180d-9d26-4042-bfa4-5ce866653192/12434014966.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4fa.bin
ef2573b9070de5ba658ca13e8352ff9f308ffc4ca7a4acc8e81c4dfd84001763		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FA 6392 bytes
font_01_sfnt_off0000ea9e.bin
e2e8c0c9b5b6b9474ce674c4f245d87432cb1df78617afd114886d9092c75bc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9E 12208 bytes

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