Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f26e07c0cc4bb8d…

MALICIOUS

PDF

74.5 KB Created: 2020-11-10 19:15:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 96804a449b0a482fc51f24e332a598ed SHA-1: d93015ad2f46988770ad1db2e6571a93c0032848 SHA-256: 2f26e07c0cc4bb8d973a38784b177d36e07988fec7ae8a21f5b669501839af10
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-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://trafffi.ru/123?keyword=percy+jackson+pdf+%25233 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377414/normal_5fa0f6f8a4d3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5f9a39fb18d5d.pdfIn PDF document text
    • https://zepaxanodufinek.weebly.com/uploads/1/3/4/4/134455649/nugomij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384480/normal_5fa4b796ce40b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377098/normal_5fa71342cfe12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450003/normal_5fa743c8d2e6f.pdfIn PDF document text
    • https://rimosuvifakub.weebly.com/uploads/1/3/4/3/134310068/riwedurakumesug-puwaxofizab-xazokidonijuto-xekekiderijav.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/0e342965-a23b-4e08-aaef-a5894f06ca04/8551354175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73177752-7f5f-4471-8921-98d9e399c6e8/16757245812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3d5efac-9e0a-49bc-a3c8-ec9ba520c99d/e_yener_belli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72d332be-9423-45b8-bf06-f1a0b425425b/11510022360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/109ab330-389a-44fe-8f78-a10d6514234b/99615316940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5828bf6-425b-4816-88cb-0144e2b425fd/lg_x_power_3_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/865839e1-17de-4923-9494-69963a67485f/megijanisimodujuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9ea7bb-e233-4935-b903-b781a3b7de40/pexeku.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_off0000e6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FF 5360 bytes
SHA-256: 0955a3f5ed6a317655321da983d7e39d7435ac544d4662c8e153b9585c02a9cf
font_01_sfnt_off0000f95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95F 10472 bytes
SHA-256: 97a71d711c729bc5c2e59347a7a14e93de7f20207dd512e2752906a54c931dcb

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