Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c92fef98727b7ee…

MALICIOUS

PDF

73.6 KB Created: 2020-11-13 03:24:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9c542b1a1bf6f570daa8be1fe5cac532 SHA-1: 17b2c9e4aac8210d7c33745a690bd3163b2f79ce SHA-256: 2c92fef98727b7ee36456a8a31991b3ae6f57f51e8e631bdd19b2c4b72974d24
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF SEO link farm. One of the primary external URLs, https://traffset.ru/strik?utm_term=origin+autostart+deaktivieren, is flagged as unknown reputation and is likely the intended destination for malicious activity. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with phishing or malware distribution.

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://traffset.ru/strik?utm_term=origin+autostart+deaktivieren PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5fa75803ce969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421472/normal_5fadcddba4615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403672/normal_5fa2b5938dabb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384296/normal_5f93bf044d20a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424672/normal_5f9a61815caf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368224/normal_5f9b1e28e9c76.pdfIn PDF document text
    • https://fafofezun.weebly.com/uploads/1/3/4/3/134338513/nakipigakazus-xufozafi-gafigotuk-fuxojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403429/normal_5f93172916d4f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2f40a7d8-d1bf-4112-820d-ff1ba5f14567/87015608149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12392ba2-0e86-4a38-aead-b4df09b5996c/rocky_mountain_blueprint_denver_co.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c57726b-840f-4b6f-8ac6-5f5c2efafba9/banofawidotimoxudap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07a2f8e1-1a33-4c84-bc9e-66d6cae051b1/gopijobulewinekevarepibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e57a1971-d6d3-43ca-a446-cb551f1f6cec/powegulasojozanelopin.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/zabukuvefixuwosuwomexibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75b6ab04-d67b-4b0c-9e2f-625b23d8cc05/vojatefatave.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD264 4996 bytes
SHA-256: c728b2922c56e272c7c93db3d5bd26a4a1a2fd4d2d799d9de9c84c0f24090b7f
font_01_sfnt_off0000e374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE374 11940 bytes
SHA-256: b9771fad0b90508847cc6ccac2b69ae3c83bd0d9bc2d0e5ec0304379d5028127
font_02_sfnt_off00010b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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