Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8c5063246fc9b0…

MALICIOUS

PDF

66.3 KB Created: 2020-11-10 05:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 94e3ebe79ed3a0dc6d3a77c314247be2 SHA-1: afb25fd96fdd983364d6dad7cebdfe9c066aea66 SHA-256: 0f8c5063246fc9b08d9edef7c081f0edbfac7010b56218b5387c506e2a8a5294
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO spam campaign. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of attempts to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffe.ru/strik?keyword=revitol+hair+removal+cream+review PDF link annotation
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/duwivif.pdfIn PDF document text
    • https://tajurasexir.weebly.com/uploads/1/3/1/6/131606020/a307e022daaf0e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392472/normal_5f9de812a5ea4.pdfIn PDF document text
    • https://sajenaviwabawi.weebly.com/uploads/1/3/4/2/134266368/mobijub.pdfIn PDF document text
    • https://xidozuju.weebly.com/uploads/1/3/4/5/134597445/278e2c0de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389821/normal_5fa08dd1f1cf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445570/normal_5f9dc3ec1cc86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445544/normal_5fa473a9a763b.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/04e93b95-5bcb-40e8-b91e-48e6f66ce0bf/18110641698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c841290-37b3-4c60-bedd-8f24fba3f070/right_triangle_trig_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36fc2d77-f72b-4cbd-8933-bdc2e2ea92ff/cnc_programming_classes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa4ca35-cefe-4a69-8016-90ee3e77fb6a/soreron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffece05b-ccb2-43e5-9ef0-1a778648b6ab/41915388750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/978bdfa9-813d-4aa7-8812-6c7af7f1e656/47889280536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be22d7e-4291-446e-bd2a-5c2a60704eff/spotted_draft_horses.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_off0000c923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC923 5020 bytes
SHA-256: b60be3a0cdc3c38a3d22fa6f81b35fa7776b70a3210054e2a8993c8efc4394fa
font_01_sfnt_off0000da1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1E 10092 bytes
SHA-256: f8da10d39c693d2890ee07b0cb50a97bbafbe2517ca9bb65c744db2090f9fdc3

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