Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0d6b8d6ed576e2…

MALICIOUS

PDF

79.8 KB Created: 2021-03-18 22:31:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 73531d15845a577b32ec04c15fa45698 SHA-1: 3613fbf4b7807b07910d7307096a676188d20d3d SHA-256: 4b0d6b8d6ed576e26f9df63d39f13108d156a657622a4d1eaba2414e19a00d51
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to an 'annual report', suggesting a lure to trick users into visiting the malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://midufefew.ru/123?utm_term=aktiebolaget+electrolux+annual+report PDF link annotation
    • http://wolotalute.iblogger.org/22122679882.pdfIn PDF document text
    • http://xogabimodefage.iblogger.org/64221264630.pdfIn PDF document text
    • http://matimomewojime.mypressonline.com/lubavirivu.pdfIn PDF document text
    • http://kutejovanog.getenjoyment.net/zafebodudax.pdfIn PDF document text
    • http://bukuxojunuz.mypressonline.com/cengage_organic_chemistry_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/60a52155-6901-4186-8884-fcdb1559b5fe/84166552624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2df506b-8ef1-474c-b78e-d5918c07b1fc/ps_vita_games_coming_soon.pdfIn PDF document text
    • http://raxaxeve.rf.gd/share_market_basics_for_beginners_in_bengali.pdfIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/73263122026.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/30665902663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4d0f852-ad39-4b47-8e88-17733803dc7e/vorulumelolide.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/37268992395.pdfIn PDF document text
    • http://duribolatajofa.atwebpages.com/weller_model_8200_parts.pdfIn PDF document text
    • http://losaxoxajav.epizy.com/lupepivuwagubogatik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f78f4fb4-9a2b-4e2a-bcf1-429a78b29def/10123129373.pdfIn PDF document text
    • http://gujupikisikali.epizy.com/tosudoponamus.pdfIn PDF document text
    • http://nizapowedasa.rf.gd/definition_of_motivation_by_maslow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f73a95e-5f1f-467c-8d16-ff31fc76f1fb/buvasukegepemefen.pdfIn PDF document text
    • http://bosulug.epizy.com/guzanul.pdfIn PDF document text
    • http://laxufazekez.atwebpages.com/bebop_drone_manual.pdfIn PDF document text
    • http://zamudijofo.epizy.com/budget_proposal_template.pdfIn PDF document text
    • http://navibizo.rf.gd/roxefusutizow.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_off0000f9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E4 5184 bytes
SHA-256: da77f125d84b0ea9e018ed5dc4ba5b22a13eab68b9d4adc788ff51bc9028379e
font_01_sfnt_off00010ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA2 10664 bytes
SHA-256: 9a9c6446f284b660f36e0fe2cd971372cd3a255b04fca3993f5a4a22698fa090

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