Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddf1d1e81938d72…

MALICIOUS

PDF

70.1 KB Created: 2021-01-03 12:09:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 9a064f2b89618b82b35e1ea75574eef6 SHA-1: 92de0eb250f8bd786685b4b4f7ac6a8f315e5621 SHA-256: 6ddf1d1e81938d72a173e1dfb22c93b53391bfb41840643f8af3a066f1494cd2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing lures, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs point to potentially malicious domains, and the document's structure suggests it's designed to redirect users to these sites.

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://trafficel.ru/aws?utm_term=afmc+merit+list+2019+pdf PDF link annotation
    • https://ranemexamegen.weebly.com/uploads/1/3/4/4/134440137/66eb174dad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450516/normal_5fe8ff7eaa782.pdfIn PDF document text
    • https://gunobapeve.weebly.com/uploads/1/3/4/7/134706327/pevexa_xofavawud_pedirutevanu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459174/normal_5fd6541ead0dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393635/normal_5fd9032618550.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369927/normal_5fe8251e52beb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378857/normal_5f90863c6061d.pdfIn PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/bezivamoxe_suzukuwijepa.pdfIn PDF document text
    • https://xakajebegufawev.weebly.com/uploads/1/3/4/7/134729098/e19ace68.pdfIn PDF document text
    • https://bapixive.weebly.com/uploads/1/3/4/3/134393773/479b475.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/a2a61ca8-9b80-4ba2-b1bb-f201a7b85df0/birupomikajatopejaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb7c405-da8e-41f0-a3d8-aceebffec621/32135811063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06afb4b9-d8f2-40e5-8d9f-61331538a597/fluval_406_filter_media.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3158cce5-1c1f-40cf-9545-b7c7fe41e9ed/59330612237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ab81b21-3975-4537-8542-5fb16ba59d7b/15727689811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1633d89f-db06-4e67-bf23-57572745523f/butterfly_knife_fade_guide.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_off0000d32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32A 5564 bytes
SHA-256: 1c2560bc564f549028bcfb104818776debf83f111204045c31fff8bc652d6137
font_01_sfnt_off0000e606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE606 11060 bytes
SHA-256: 32ee3d6e59ec8c5bf3b551726e116f52596509d9b131dcaf6d90e983cb1e72b8

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