Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb65c1614bd9605…

MALICIOUS

PDF

69.3 KB Created: 2020-11-22 10:38:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a669f21313bc07ed2c063f7a0b534a80 SHA-1: d39539267970dd9d1e810808bc5b12c7a03c77d8 SHA-256: ceb65c1614bd96054c290b1e7ff5d20d089e9591671c6eba88c67f06230b97a3
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://traffking.ru/123?utm_term=oye+lucky+lucky+oye+rotten+tomatoes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454665/normal_5fae0a9b0fc72.pdfIn PDF document text
    • https://folukufisika.weebly.com/uploads/1/3/1/3/131384255/13315d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402519/normal_5fa1e39024d08.pdfIn PDF document text
    • https://kodepukezaxa.weebly.com/uploads/1/3/4/6/134665187/8fb7991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5fb68ed4be90f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403417/normal_5fa7592e204d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485442/normal_5fb8b2ddc158a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f873ff322133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_5f87604ff3510.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378836/normal_5f8c0951c6c94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418584/normal_5f9c99e284250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_5f91aab247dd9.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/3f3d9b42-6d19-4db5-9e0c-49df58866436/starting_out_with_java_early_objects_6th_edition_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/008ab87c-1308-4e16-9771-059b302d279c/solo_raid_guide_pokemon_go.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfb3caa7-2585-4630-b932-05bc31206165/kualoa_beach_park_camping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/668ea6d9-200e-47ab-a427-44973facd431/que_es_inbox_en_espanol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee51c85-90f7-4a20-8905-ae6fb707adea/ultrasonido_pelvico_preparacion.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_off0000d42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42C 5140 bytes
SHA-256: 8309f3a46bb49d7cef2418c2ace1fd68a630d0acc979ecb710e07b89789a5bd2
font_01_sfnt_off0000e594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE594 10144 bytes
SHA-256: b536787d5d76f13bd7fa73be99caa260e7f23426ac09a2c96a47d396a67fd44b

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