Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c94f571bba6c18…

MALICIOUS

PDF

69.5 KB Created: 2020-11-17 09:37:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a41ece982a0330c57ccfa6063d16f0c8 SHA-1: 20b8858c1406f62595e2df39a158ec6bb870a226 SHA-256: 17c94f571bba6c18d9cde43c331e968a19c5feb0c1ae52c2d2b1e2e71e3d6201
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by a ML classifier and ClamAV, indicating a phishing or trojan payload. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host a large number of external links, likely for SEO manipulation or to distribute further malicious content. One of the primary external links identified is to 'traffking.ru', which is a known malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/strik?utm_term=tv+show+pitch+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392191/normal_5f9b3e5f3187d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374199/normal_5f8a2240beb92.pdfIn PDF document text
    • https://vogoworelo.weebly.com/uploads/1/3/4/2/134266182/basululelutotem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413473/normal_5fa19faf2f690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_5f9c92b2e27ff.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/66b7a59d-ab4f-4e4a-877b-cda3a79f229f/write_3.25_as_a_fraction_in_lowest_terms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7877ff41-11c7-488f-9716-3655bf1a378a/fasaxebuzofog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a5766aa-929f-4a82-b6f1-6befc9963ef4/84070217016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f57d9d6d-2102-4ce6-9d87-ecec8bbcfbaa/taferajowipaditobove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af5b6e66-850d-4f63-8fa5-89a18a34dc57/ramipokuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb5af58b-b3dd-4227-aa68-b8cd6d6cdaa5/17356738017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5838af60-9d2b-492c-95fd-dbabccf4453a/63269799492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5235a7b3-2296-4b43-b985-d597b9bc4cdb/vidmate_apk_file_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/375e2b1f-ab68-4c2b-b936-51bb470065ca/zirulajidawavuzirimivu.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_off0000d341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD341 5176 bytes
SHA-256: b5b60799f49a3671767112905a525b96222ab033a0c9ad3458595d682e2e08ab
font_01_sfnt_off0000e4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D1 10588 bytes
SHA-256: 20d1a138113e001c778979c8d3bb78b45aa139e4bf1806636017624b24fdc412

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