Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0a4eb8731c92f7…

MALICIOUS

PDF

74.6 KB Created: 2021-02-14 16:34:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b064f9f1eea8fc7000ce42594e61c5f7 SHA-1: e5fc2a89e7c2aec56b25ff25c0b4fbf26ad6cb9c SHA-256: dc0a4eb8731c92f783466dac3cfacfc7affdb183215b9e5b66548deeb5f3ef01
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or scam campaign. The PDF structure and embedded content indicate it's likely intended to redirect users to malicious websites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/aws?utm_term=nought+and+crosses+template PDF link annotation
    • http://reduslim-official.website/48822378025wqf6.pdfIn PDF document text
    • https://kixovojowabib.weebly.com/uploads/1/3/5/9/135966002/wudijeso-wabamuvisu-newazuki.pdfIn PDF document text
    • http://kilagine.22web.org/rojudoxajofufimibagexamo.pdfIn PDF document text
    • http://tortomsk.ru/clackamas_county_courthouse_forms7h9kw.pdfIn PDF document text
    • http://svoytrylend.xyz/mauser_98_identification_guide3vw65.pdfIn PDF document text
    • http://lighterusb24.site/gutelusaxolukxjyih.pdfIn PDF document text
    • http://espaceabonnes.com/kurodudimalawujevonabutxii.pdfIn PDF document text
    • http://help-violation.com/48761510683250f7.pdfIn PDF document text
    • https://sunajekivogemaz.weebly.com/uploads/1/3/4/8/134895881/wepuloza-jajodujobi.pdfIn PDF document text
    • http://123dutch.com/corsair_void_not_working_with_discordnoyy9.pdfIn PDF document text
    • https://wisenuru.weebly.com/uploads/1/3/1/8/131856959/nowijoje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sobuzazan.rf.gd/bluetooth_windows_8_acer.pdfIn PDF document text
    • http://nikejubefip.epizy.com/jopiwulimufaxiz.pdfIn PDF document text
    • http://masifegudogona.rf.gd/kutevupelinukemuj.pdfIn PDF document text
    • http://vaxuraribo.rf.gd/tracheostomy_icu_guidelines.pdfIn PDF document text
    • http://muvalinifotu.rf.gd/artioscad_software_free_full_version.pdfIn PDF document text
    • http://kuzezoma.epizy.com/free_psychometric_personality_test_questions_and_answers.pdfIn PDF document text
    • http://ripikeze.rf.gd/australian_dietary_guidelines_for_fat_intake.pdfIn PDF document text
    • http://pivekukevojadu.epizy.com/befazu.pdfIn PDF document text
    • http://dowijasimenazo.epizy.com/best_free_android_barcode_scanner_app.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_off0000e608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE608 5456 bytes
SHA-256: 4394577f44ee111c0d196ac643d1fd038512b6e6a497f26686d983c825daff0f
font_01_sfnt_off0000f871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF871 10760 bytes
SHA-256: c7a6985075ac8ef2da3471e434993bb14b789c7579a0beff89fea2507a2bfa99

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