Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2892319454dcaa…

MALICIOUS

PDF

76.9 KB Created: 2021-05-14 00:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3d4873cb34943b6e6be92a5938b7dd19 SHA-1: 966f61016771cb7fb337b3745f357218e08aac19 SHA-256: 5b2892319454dcaa1cac47045f1c1762b217d46f122f5be2fa8540013b590773
126 Risk Score

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 0.9991

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 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://jacksth.ru/strik?utm_term=how+much+time+to+give+for+a+letter+of+recommendation PDF link annotation
    • https://cdn.sqhk.co/xenotami/IPie3OP/51838842827.pdfIn PDF document text
    • http://rabizepafuxonag.mypressonline.com/74808470655.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/buffalo_soldier_chords.pdfIn PDF document text
    • http://bujenaro.scienceontheweb.net/carduelis_cucullata.pdfIn PDF document text
    • https://wazajodowefode.weebly.com/uploads/1/3/4/0/134017502/8774297.pdfIn PDF document text
    • http://kavademive.sportsontheweb.net/73667729371.pdfIn PDF document text
    • https://zadisoro.weebly.com/uploads/1/3/4/5/134525292/xovimesuzob-moxobo-posesifadajufo.pdfIn PDF document text
    • https://wipibafupegivu.weebly.com/uploads/1/3/4/8/134868488/tatumipu_vifateru_gipup_vobotapirumomex.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/iiGkxXH/52127102900.pdfIn PDF document text
    • http://kajejib.medianewsonline.com/how_to_make_an_origami_ninja_star_with_square_paper.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/60740757ccc8.pdfIn PDF document text
    • http://kifopelidito.mypressonline.com/tokitifevepepakateloka.pdfIn PDF document text
    • http://zugugalepew.mypressonline.com/sword_art_online_games_worth_playing.pdfIn PDF document text
    • https://kaxaratit.weebly.com/uploads/1/3/5/3/135383379/rubekaxinidikizumiki.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisezepemu/ifRgjpI/5005183479.pdfIn PDF document text
    • https://cdn.sqhk.co/muwanije/thgjhgj/discovery_lunar_marble_run_instructions.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/70005538806.pdfIn PDF document text
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/xavagep.pdfIn PDF document text
    • http://josumewemuzob.getenjoyment.net/20550052677.pdfIn PDF document text
    • https://megefutuw.weebly.com/uploads/1/3/0/9/130969536/wijuvuzataxad.pdfIn PDF document text
    • https://webupusew.weebly.com/uploads/1/3/5/3/135344455/fetuviwud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/real_analysis_rudin_book.pdfIn PDF document text
    • http://jomupaz.myartsonline.com/kerepusilanor.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/mofuwomojitof.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

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_off0000f06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06A 5368 bytes
SHA-256: 2f4b22a01970ec5a41b02935f84274e73b9aca5c0dac95d1cc8314f140eb9ded
font_01_sfnt_off0001029c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029C 10340 bytes
SHA-256: 1489541ae72c540da425ced747c726d4a261ee972ffe9bdf34caec77bd25c6f3

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