Malicious PDF — malware analysis report

Static analysis result for SHA-256 450fd777ee3a6d19…

MALICIOUS

PDF

76.7 KB Created: 2021-04-14 01:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e5240932599db5338a6ded2c2239e3d7 SHA-1: 724e8101c68398a6cc35d0d75b76f5dec55c6367 SHA-256: 450fd777ee3a6d197d10c5a81ef46eb3ba2f5ae1c5d870602f5cd8e8f68dd2f4
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 0.9960

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://crophysi.ru/strik?utm_term=kyocera+qualcomm+3g+cdma+phone+hard+reset PDF link annotation
    • http://ketrovk.xyz/is_kundli_matching_necessary_for_love_marriagejmli7.pdfIn PDF document text
    • http://miiliioner.xyz/slaves_to_darkness_army_list1u5cs.pdfIn PDF document text
    • https://bunoworerut.weebly.com/uploads/1/3/1/4/131438217/jovexivezedul-nogun-ragugelukej-posawidudexafo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450240/normal_60004983415da.pdfIn PDF document text
    • https://vevusivo.weebly.com/uploads/1/3/0/8/130874001/lekodowexigugi_zebewal.pdfIn PDF document text
    • http://zifezuguwimifu.22web.org/jarerivezanepujobumeja.pdfIn PDF document text
    • http://fuckfrsky.com/maxafabarubalurobzr67.pdfIn PDF document text
    • http://kartaidatodemeleri.com/boss_ve-20_vocal_performer_multi-effects_pedal_reviewnb7a3.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/ZhfUihN/free_games_bubble_shooter_online.pdfIn PDF document text
    • https://cdn.sqhk.co/tuparesoxaj/skifcgc/getojoxojoximegiza.pdfIn PDF document text
    • https://wuxinaruniluxod.weebly.com/uploads/1/3/4/8/134882591/bixevopaxifupamituni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471240/normal_5fea13c3a2afb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499334/normal_5fdb227de3e9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493195/normal_5fd645f2a3c69.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxujagemo/fCHshfy/holy_bible_king_james_version.pdfIn PDF document text
    • http://alifan.store/how_human_beings_depend_on_environmentv2zil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367287/normal_5fc71ceb4d0c6.pdfIn PDF document text
    • http://ravasixojodari.mygamesonline.org/thyroid_function_test_biochemistry.pdfIn PDF document text
    • https://girenofozajete.weebly.com/uploads/1/3/4/4/134476001/8543881.pdfIn PDF document text
    • https://cdn.sqhk.co/xawemubimaj/X7f5fQA/alien_shooter_game_online.pdfIn PDF document text
    • https://toxuxejegeze.weebly.com/uploads/1/3/5/3/135317786/sulugag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mavalivum.rf.gd/mutipub.pdfIn PDF document text
    • http://surowopewol.epizy.com/european_guidelines_of_hypertension_2018.pdfIn PDF document text
    • http://relixaweb.rf.gd/xorararav.pdfIn PDF document text
    • http://gafodix.myartsonline.com/zodivalawenikovaxuz.pdfIn PDF document text
    • http://moxuzaridob.onlinewebshop.net/vecteur_directeur_et_vecteur_normal.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD7 5848 bytes
SHA-256: f370931314eb8c6b4b5eebb862067b2eef0582a1cdbec00fbc8b8cfe9447353e
font_01_sfnt_off0000ff9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9A 11048 bytes
SHA-256: 872cca224ee6f119d00d9cf681e72278fecc3e64a9e6420356f49205270d7407

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