Malicious PDF — malware analysis report

Static analysis result for SHA-256 1710d58ea46e4df9…

MALICIOUS

PDF

77.1 KB Created: 2021-04-07 23:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8e429ff777236998a803608ee9f79cae SHA-1: 234a7160f35120a4e1cee418f4361bb2af60ffbc SHA-256: 1710d58ea46e4df9b5b85c1fc7a3b40d3db640cb75ad2d983867b5d17aab965c
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm on disposable hosting. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/strik?utm_term=dark+they+were+and+golden+eyed+story+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408188/normal_601be4fc8aee3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480142/normal_601314a26f1ca.pdfIn PDF document text
    • http://pezozolagipiv.22web.org/transformers_prime_fanfiction_bumblebee_dies.pdfIn PDF document text
    • http://lukosewikaj.22web.org/65701170991.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368969/normal_5fc9aa3e1119d.pdfIn PDF document text
    • http://dewapop.22web.org/desh_bhakti_images_hd.pdfIn PDF document text
    • http://vivebax.iblogger.org/what_are_newtons_3_laws_simplified.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385421/normal_6019976914265.pdfIn PDF document text
    • http://fegulizomes.22web.org/blockchain_digitally_rebuilding_the_real_estate_industry.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461746/normal_604492ff8faaf.pdfIn PDF document text
    • http://maxitis.22web.org/zekixovepulutokew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_3b7ebabcbc804e07b86441c9cc5933c6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/adverse_reaction_formaldehyde.pdfIn PDF document text
    • http://pujusojup.epizy.com/blank_unit_circle_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/50818378131.pdfIn PDF document text
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_4a0271ec2f3d4f25a1b2b14a5537730f.pdf?index=trueIn PDF document text
    • http://fomudugeriju.epizy.com/84679899934.pdfIn PDF document text
    • https://f3c4034a-4a94-4c47-b6c5-0445626d7bf8.filesusr.com/ugd/655f09_bfb7795e604148a199f14687ea4ac8b8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/hedwig_s_theme_piano_sheet_music_advanced.pdfIn PDF document text
    • http://sefobetibaboxi.epizy.com/kinasiwesevafidobewan.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/personal_statement_for_jobs_template.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_off0000ef43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF43 5560 bytes
SHA-256: eb21eb69486873ca1ef11975fbd639773296fb5a79c389f0a1885bb6a89b5d6c
font_01_sfnt_off00010254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10254 10568 bytes
SHA-256: 594d516ab11642d5de917052a0d6f7bd4f58ee7bfd2197b3011c5d79d6fc332d

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