Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82d6a87408fd86f…

MALICIOUS

PDF

81.5 KB Created: 2020-11-19 23:07:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0b73d6cd445c538744463ff0d1dee7b5 SHA-1: 2dc465a8870a1ed9d0d9eee1b091214179176b05 SHA-256: e82d6a87408fd86f3be153f16f5361c74ab24108897544930473184a64072b5d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links to various websites, some of which are hosted on disposable domains. The primary URL, 'https://traffnew.ru/123?utm_term=parametric+equations+calculator+symbolab', suggests a potential phishing or SEO manipulation lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffnew.ru/123?utm_term=parametric+equations+calculator+symbolab PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f8e337888060.pdfIn PDF document text
    • https://pogabivapiz.weebly.com/uploads/1/3/4/3/134327153/4174337.pdfIn PDF document text
    • https://tegawaniro.weebly.com/uploads/1/3/4/3/134330557/xanabejirafumakad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379374/normal_5f9509f305154.pdfIn PDF document text
    • https://metozalolak.weebly.com/uploads/1/3/4/6/134610510/rupesimeb-jisaxokapixofa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393508/normal_5f94ac57c72e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5f8f494fa5f38.pdfIn PDF document text
    • https://wagofokixe.weebly.com/uploads/1/3/4/6/134694124/444a2.pdfIn PDF document text
    • https://vulagikivup.weebly.com/uploads/1/3/4/2/134234906/5476100.pdfIn PDF document text
    • https://zeginuvo.weebly.com/uploads/1/3/0/7/130775519/7c6269aba0239.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/16fd89b5-31c5-4dca-99c9-99d5f422029c/mccabe_smith_and_harriott.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35baea0e-1a97-40ff-aa8d-6faf22b5b1c5/poesia_de_despedida_para_sexto_grado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/264da9ef-256b-44bc-a431-b6411848da00/87946357356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b6b80c0-2e52-466c-b9e3-7b99726f3bae/summary_of_things_fall_apart_chapter_12.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_off0000dd82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD82 5312 bytes
SHA-256: b7688c855d42bbb95755e0f9fea3714b55cdd6a718daf23b68e0727816d8dd79
font_01_sfnt_off0000ef85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF85 15760 bytes
SHA-256: 5f34854ecb52a5e350ee558848ba9ce0890f633d3a90b7043385bf8c7ed3e422
font_02_sfnt_off00012147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12147 16080 bytes
SHA-256: a534b91c4ec3d8756e3a834051570443c69e75f38d6508a28567570861ffac3d

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