Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ef21e8ea06eec3…

MALICIOUS

PDF

82.9 KB Created: 2021-04-30 11:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ed883a529685b58c7aeece39fa0e354 SHA-1: 150edbd88b23f466f7b78fa8269d9199518d5033 SHA-256: 43ef21e8ea06eec37fa0b62d9c8dbe8c70ab946073740662225540ab0e84f6a5
146 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are likely part of a phishing or scam campaign. The heuristic 'SE_CALLBACK_LURE' indicates the document's content is designed to trick users into calling a number, consistent with tech-support scams or refund phishing. While no scripts were explicitly extracted, the PDF structure and numerous malicious URLs suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=using+20w50+instead+of+5w30
    • http://springital.fun/gololimus23mf.pdf
    • http://wildber.store/linfoma_de_burkitt_y_vihnx5it.pdf
    • http://idealicaufficiale.website/guideline_tb_2018i306k.pdf
    • http://kyponnik.online/person_tracker_toolkit_2017_appb0et9.pdf
    • http://rejorevubirobu.sportsontheweb.net/xapidowikobarila.pdf
    • http://vulufinagi.mypressonline.com/51652083566.pdf
    • http://ch-bewertung-2888.xyz/280654920699k24p.pdf
    • http://retapadu.medianewsonline.com/alcon_rebate_2020.pdf
    • http://blockhcain.host/31466367538kj0q3.pdf
    • http://navaram.online/fakapezud99ue.pdf
    • http://prizinsta365.website/komijekifurapukadusarivoggs45w.pdf
    • http://blankid.ru/mogadeduxawumow4cgt8.pdf
    • http://bonboxstudio.com/jififomapalikivepijuybc0e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zepifudoxapo/43435734574.pdf
    • https://8d537faf-e869-4ed9-a29f-988560fab1dc.filesusr.com/ugd/0cce51_fb5370e24beb414d81a2f0501f00e289.pdf?index=true
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_d943fbcef09e4933a2cd99af3eb07131.pdf?index=true
    • https://s3.amazonaws.com/lekezaru/rixuratu.pdf
    • http://gosaduzunake.myartsonline.com/karutamurexadadakadofu.pdf
    • https://s3.amazonaws.com/wozowuledij/7242855201.pdf
    • https://s3.amazonaws.com/zedudo/what_is_the_driving_test_like_in_minnesota.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_off000105b2.bin
05d3c7662631207890c62ec5cc00bc9138fe024ee663be3cd0eafa8d1aeb2e8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105B2 5592 bytes
font_01_sfnt_off000118f7.bin
7ea0de9da27a2dc92d82ee83c18ffdb9c3b074d35e7be54e1dae05c0228ec035		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118F7 10804 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.