Malicious PDF — malware analysis report

Static analysis result for SHA-256 8444e33a0a49a4aa…

MALICIOUS

PDF

79.0 KB Created: 2021-04-25 23:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66766bb0f33da5a814ac279813572f95 SHA-1: 2896438c9d0c2802b49c45889abbb4cc158c432f SHA-256: 8444e33a0a49a4aa9621f23e69b1574608dc69711290f6508ce6fec992917413
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL suggesting a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though partially corrupted, contains text related to email and a tool name, further supporting a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=o+que+significa+p.s+no+email
    • https://cdn-cms.f-static.net/uploads/4405687/normal_606431d2ba4a7.pdf
    • https://cdn-cms.f-static.net/uploads/4456999/normal_601772bbc77f6.pdf
    • https://gedimonisesejed.weebly.com/uploads/1/3/1/1/131163996/6638374.pdf
    • https://cdn-cms.f-static.net/uploads/4465388/normal_606de7954600f.pdf
    • https://cdn.sqhk.co/nuduniguwufo/Vgi6Qh9/41998897868.pdf
    • https://cdn.sqhk.co/dabozijide/hjCijgd/basketball_hoop_black_background.pdf
    • https://cdn.sqhk.co/sovixojer/mjaDEje/all_about_history_book_of_ancient_egypt.pdf
    • https://fezawajudew.weebly.com/uploads/1/3/4/8/134896424/ca2ecaf2.pdf
    • https://static.s123-cdn-static.com/uploads/4367631/normal_5ff6a4a98b305.pdf
    • http://vuwiwetidajin.mywebcommunity.org/anomalia_de_ebstein_adulto.pdf
    • https://static.s123-cdn-static.com/uploads/4479224/normal_5ff2773633c6c.pdf
    • https://cdn.sqhk.co/buvovemif/ChiicxB/verb_exercises_for_class_6_with_answers.pdf
    • https://cdn.sqhk.co/vetejevibas/gIrjiZZ/homestar_runner_halloween_game.pdf
    • https://cdn.sqhk.co/bamebuxi/ngg6ahO/bruce_lee_enter_the_game_ios.pdf
    • https://cdn.sqhk.co/pofaxiniraz/ic6vZN5/15138035139.pdf
    • https://xaredoluvowa.weebly.com/uploads/1/3/1/8/131871785/840266.pdf
    • https://cdn.sqhk.co/miwizawi/JNhihhV/besojixugemuru.pdf
    • https://xurekibovadava.weebly.com/uploads/1/3/0/9/130969225/zaxemijawego-vivasewuvebo.pdf
    • https://cdn.sqhk.co/butofelo/Fhfjzhc/72730604105.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wofaxil/rarexuburipifijoritufuj.pdf
    • https://s3.amazonaws.com/xufujofaleki/dd_time_travel_spells.pdf
    • http://velelakolifuvu.onlinewebshop.net/bhagavad_gita_telugu_free_download.pdf
    • https://s3.amazonaws.com/tokafanawa/zunivexujebabo.pdf
    • https://s3.amazonaws.com/loxopudizus/define_survival_of_the_fittest_in_biology.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1fe.bin
8a3c45f68c163d2f5baa856c8894d5d57ae0ea531c2386eb472e0c8e190ebfab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FE 5424 bytes
font_01_sfnt_off00010472.bin
68fa4390dfaff5e6cdca228d8b5ce8d486dd310a49da07f1254d2550046b96a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10472 13420 bytes

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