Malicious PDF — malware analysis report

Static analysis result for SHA-256 705fcf2dd00d08d6…

MALICIOUS

PDF

69.0 KB Created: 2020-12-23 07:46:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: daba60b68db6f91732c326028dbef14c SHA-1: e785ab01f6fdbc56464d0bd3ae65d45f299ddfe1 SHA-256: 705fcf2dd00d08d69e0618bacecddefb2f3189bdf72b2bbd2819bf6922fb76c7
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://traffmen.ru/strik. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, one of which is https://uploads.strikinglycdn.com/files/ee8f726f-7179-4093-8b85-f5fbaf4f939c/2019_mini_cooper_s_owners_manual.pdf. The ML classifier and ClamAV also flagged this file as malicious, supporting a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=kitchen+chef+super+star+restaurant+cooking+game In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389599/normal_5f8df36a22a8d.pdfIn PDF document text
    • https://mabulibatelirip.weebly.com/uploads/1/3/4/5/134597637/4853106.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/ee8f726f-7179-4093-8b85-f5fbaf4f939c/2019_mini_cooper_s_owners_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe1915771c2c40cd11c8684/t/5fe1ba5c82304d7322c97948/1608628829869/logo_game_pack_38_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcb4ce3d-81f8-4a5b-bbc5-8543feca3f88/48649684989.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcacb310a8fb02f5d5db8a/t/5fdcd6996c473137a87c262a/1608308377243/33493792069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31b55716-83a5-42bd-8245-81d9a4e1d8be/med-el_austria_address.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ab7fc9f-b7f2-4ec8-8c42-787f16434616/moxudug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/990d02d5-e2c1-4089-ad58-e7a360cc8801/ticks_in_northern_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbbae983-2363-49ec-82a3-bdf49a51df51/14712862332.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_off0000d121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD121 5432 bytes
SHA-256: 8644531b93bab3bb4dceb4a96a09986e5b42ac735b3a1fb8e32cecfcd8395601
font_01_sfnt_off0000e37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37A 10692 bytes
SHA-256: 3199c14f07244f9d4d8fea2bc76d432e0c78de147b1b420925198541de1b6185

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