Malicious PDF — malware analysis report

Static analysis result for SHA-256 78049622ad73f0d7…

MALICIOUS

PDF

82.6 KB Created: 2021-03-20 03:51:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 67d9f9d21d2e85af3f93f6c806fffac1 SHA-1: 9c3f9eafc6baa17c3313efb1a46a408015e924c4 SHA-256: 78049622ad73f0d7972370e723c90b213be72a11d1445db5a3d8ca973b32115e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

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 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://vilenefex.ru/award?keyword=barok+literatura+pdf PDF link annotation
    • http://rexuwoxaga.sportsontheweb.net/download_microsoft_office_word_2013_free_full_version_for_mac.pdfIn PDF document text
    • http://mawejufikesiruw.22web.org/padatogol.pdfIn PDF document text
    • http://samokex.sportsontheweb.net/2963882224.pdfIn PDF document text
    • http://vowuzif.22web.org/shadowlands_requirements_for_covenant.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/is_international_mail_coming_to_canada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374533/normal_604894be52359.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446636/normal_60552286074df.pdfIn PDF document text
    • http://zarewubizeno.mywebcommunity.org/vowaleguto.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/66631933393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418170/normal_5fd73e4cc89ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c30b87d5-e38e-4f4c-8f61-e356d9eaafe8.filesusr.com/ugd/347120_5c379fc878284a2cb9d5ca1ec9eda9db.pdf?index=trueIn PDF document text
    • http://xizodoja.epizy.com/73254568314.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/jokinevoratap.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/68406474770.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/does_kriya_yoga_awaken_kundalini.pdfIn PDF document text
    • http://numebazo.rf.gd/back-_end_developer_handbook_2018.pdfIn PDF document text
    • https://74df6fe0-557b-4e47-8461-f2df536053d0.filesusr.com/ugd/4dcf4e_b270f52d92c4407381df770b78ae8a78.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/74119754392.pdfIn PDF document text
    • http://zepurudevivo.rf.gd/58597460424.pdfIn PDF document text
    • http://roxonotagake.rf.gd/limit_of_quantitation_ich_guidelines.pdfIn PDF document text
    • http://wurunuj.epizy.com/year_7_math_worksheets.pdfIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_87bffc237cf747608dbb5dbd6c07315e.pdf?index=trueIn 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D5 4968 bytes
SHA-256: 1331e29fdc5def6b545c47d99c4aeb0bf787fc32cbee4a4f57985f680b6e08d9
font_01_sfnt_off000117cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CF 11956 bytes
SHA-256: c1e0d5b723ff9da7dab71f5696704fc7e28d934a822eade7c968120034dfef8a

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