Malicious PDF — malware analysis report

Static analysis result for SHA-256 67afbf931c852f84…

MALICIOUS

PDF

74.6 KB Created: 2021-05-08 22:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 469f91e7153af70cadf61db14809be81 SHA-1: 85fadc3c0dd468a41230466ebe1aa14ac37eb370 SHA-256: 67afbf931c852f84565b8141a1e64b612642ac34e83319d35f6c667077563cda
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 0.9998

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 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://zajinet.ru/strik?utm_term=que+es+una+composici%25C3%25B3n+literaria PDF link annotation
    • http://picsonair.com/In PDF document text
    • http://pavozuketogo.mygamesonline.org/financial_statement_analysis_questions_and_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480591/normal_6038ef9ba34a4.pdfIn PDF document text
    • http://gukivuzijisuva.getenjoyment.net/carvallo_sign.pdfIn PDF document text
    • http://shtancircul.site/how_to_become_a_spiritual_life_coach_ukpt755.pdfIn PDF document text
    • http://petrol-v-pol-price.site/61188789021n3qql.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412388/normal_6018d2c39325f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480174/normal_601f56b64a53b.pdfIn PDF document text
    • http://zixivudu.getenjoyment.net/benulapixujafabab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383695/normal_5fe0e6e21b2ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455381/normal_6066cce992b9f.pdfIn PDF document text
    • http://livecopyrightverification.com/pazoruzu66h3f.pdfIn PDF document text
    • https://tiramanab.weebly.com/uploads/1/3/1/8/131856622/baremajazoxum_pasiwodipe_sokapi.pdfIn PDF document text
    • https://tewazaxapij.weebly.com/uploads/1/3/4/8/134873756/penuxubenofeb-ravexo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0c6b7a74-1ca0-41da-943c-c268a208a416.filesusr.com/ugd/fef373_7ef896bb0fb04012b4b1ed7e0de0ec9f.pdf?index=trueIn PDF document text
    • https://0ffdd24b-620b-4f4d-94ef-a39da1ca20bd.filesusr.com/ugd/853ce2_1458c37f2f6841bf8355af33eefc8552.pdf?index=trueIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_988a8c612c634ad39af5443a2277c4d6.pdf?index=trueIn PDF document text
    • https://92fbd7ca-8480-4723-bb2c-19523f9dca15.filesusr.com/ugd/29946e_4fd1760e015743b181dc86db6a3cf02a.pdf?index=trueIn PDF document text
    • https://88e92b2d-3ddf-41b2-a2ae-4af48bfba274.filesusr.com/ugd/b74686_fcffdfde0b674522ba05923e5a418a5e.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_off0000e293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE293 5276 bytes
SHA-256: 0a0d3ab989f50d88631a6a9880403e4ddab9838e3f5b591c1e2c6679ea77299b
font_01_sfnt_off0000f42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42E 12064 bytes
SHA-256: 633f482227788efee77fe76a5470b90009b3b23c05d9fd52c560ac33df47101e

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