Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd68920ddabf91a…

MALICIOUS

PDF

73.3 KB Created: 2020-11-14 00:06:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 79f4738d59a34003052083af57ed2c23 SHA-1: 2538642422bd92d016444d0d0c576e9939ad9767 SHA-256: 9fd68920ddabf91a8e82f1d83600947c970791007cda7f72a5900ab1ee6d2377
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with one prominent URL pointing to 'trafftec.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

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://trafftec.ru/aws?utm_term=friskies+pate+feeding+guide PDF link annotation
    • https://xutomanuvafara.weebly.com/uploads/1/3/4/3/134345830/tenavapa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370072/normal_5faf02cea4728.pdfIn PDF document text
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/xubavopob-tewepokojazali-tomudor.pdfIn PDF document text
    • https://jojurofi.weebly.com/uploads/1/3/4/6/134666092/mijadotowif.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/bcf5ac2d-9383-4e71-b5d5-b8f719524405/lowobevapuxetotufeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3350b5f1-7d87-44ef-b6c9-82d1d38955ba/bowedotiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33f4ff07-bcc5-4ff3-8980-926ed0049fe8/14977649479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2879fd80-1262-462b-b983-bdb6e40fef57/silent_hill_3_monsters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4291ee85-0cd5-41f3-aef4-ecd49757bda8/93668572047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a850963c-a0f8-4e45-bf6e-ea52afc064b4/ai_aoyama_queen_love.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f737c5f-b0cf-483a-ac8a-c9f1c13e96d4/zotabatedepiwuditer.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/50931330045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49b5629-122a-48f2-9e69-5f1a463ab694/bexikogowabajikaj.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF35 5196 bytes
SHA-256: 684fe0f0d1eb3b48c7902b2701ab5d85e0aba54e2920e1bc9735db3f957deabf
font_01_sfnt_off0000f0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FB 11596 bytes
SHA-256: eca31feb20ef466aa88eb0d1ea4e6e0474d06b62b40ff65b2067f595fbc37ab8

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