Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa823c6d5985b1b…

MALICIOUS

PDF

77.0 KB Created: 2020-11-11 03:24:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cbef0b94a1ef609d0ad8f719c0c1dda4 SHA-1: dca63e701bcb4e59c488bcc4a2edf37b8cc2cd3b SHA-256: 2fa823c6d5985b1b44c9b069d2078033b69b3775dfb93a1dbc1dca1d8902a155
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffine.ru/123?keyword=wow+classic+rogue+darkmantle+quest+line PDF link annotation
    • https://zijananuwale.weebly.com/uploads/1/3/4/4/134438714/4fc0c0f1734ef.pdfIn PDF document text
    • https://zuzuxaze.weebly.com/uploads/1/3/4/0/134040629/petuf.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/5576562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418365/normal_5f9a0dc86c415.pdfIn PDF document text
    • https://kozitasulama.weebly.com/uploads/1/3/4/6/134647404/vetulofaxiru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388178/normal_5f9932a6c8fda.pdfIn PDF document text
    • https://vokewubepil.weebly.com/uploads/1/3/4/4/134443825/5e12db194438d1f.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/54a3cba8-dce8-481d-a82d-e3f78e6c9a9f/73927824301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29f4c3b4-0b2b-43d9-92b9-3f49bdb4cb6e/harry_potter_envelope_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f8b13fb-a847-40bb-a346-9327890a8f60/pavimovasijof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a918a2a-8d4c-48b2-b65a-21c160d0aca6/63779005691.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4a1db5-7e6e-4545-a85c-13801ab0af64/51529960197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07748de3-2ac8-46b2-accc-ada15c775673/pizotivuvavovebulotavegaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb6f6e0-70ae-43a9-8e52-4a9f0169cc61/fumubek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b755e03-ca50-4c83-a1c1-4418e24c117e/39800159600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5fb4d09-d12a-478a-bcec-1000a43608aa/badidewanevobeb.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_off0000ef1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1C 5552 bytes
SHA-256: f712d6bd7c2994db7cb2fd67735f6b16f1ee14335e49edf92148184008c30099
font_01_sfnt_off000101fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FA 10812 bytes
SHA-256: 617c1c25c0b70f070faf3683475024a365a23068dcfbdd0093b8efef840ff43d

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