Malicious PDF — malware analysis report

Static analysis result for SHA-256 d38637a1642d24d1…

MALICIOUS

PDF

69.5 KB Created: 2020-11-17 08:52:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ba17ece51c9c0b3587f07379691e768e SHA-1: b406b64710847379348dbb0e2c16b5aac69606dd SHA-256: d38637a1642d24d187ed9a5eb2c264846346870c5d9aa3bced70680e47f901b7
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://trafftec.ru/123?utm_term=destiny+2+counterbalance+mod+sniper PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5f97a892f0193.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_5faba9c9b703f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369315/normal_5f8e360b1848a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451220/normal_5fa012dce27b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5f8acad84a626.pdfIn PDF document text
    • https://kemosufasegu.weebly.com/uploads/1/3/4/3/134348140/5044cf237.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/72c45881-199d-4495-80a2-81a6a8a805e3/novagatepifigatugazuz.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/sazagib.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/creative_problem_solving_in_school_mathematics_lenchner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da276e2e-30c1-4bd7-9648-c6fa53a46f06/stihl_026_parts_breakdown.pdfIn PDF document text
    • https://s3.amazonaws.com/vasagesorajirem/hungry_shark_evolution_hack_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41ced815-237b-4223-9eed-a133c260aa0a/cameron_county_pa_courthouse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6be822b-7e47-4915-95c1-c2168ac51e16/51303949779.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2F 5592 bytes
SHA-256: 28cf195985d1d60d610cc4e9272bc7b73f2f6f7052066dc00ccca7d2d43d178f
font_01_sfnt_off0000cd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD24 10588 bytes
SHA-256: 225874b61bf0b12262dd051d968440185c3c1031fa9745da4028be113aa5fef7
font_02_sfnt_off0000f196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF196 16756 bytes
SHA-256: 2cd8dc449e806b8f36ce25fbe23924badef7d41c06ce73e693dcd0b6be98825b

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