Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c58e1d73ccaf0d…

MALICIOUS

PDF

69.8 KB Created: 2021-02-26 11:10:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 459b6e5956e5af207aca63e95ea495b7 SHA-1: a5b8cf9753c3250ff45eee213b6304f50a6f5220 SHA-256: 95c58e1d73ccaf0d7184bc5da6c37c681dcff0ba585fde9564d458ff7406f23e
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains text related to setting a clock, likely a lure to disguise the malicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=how+to+set+a+timex+clock PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368969/normal_5ff9b692db58c.pdfIn PDF document text
    • https://tusezewepoxir.weebly.com/uploads/1/3/4/3/134339989/xewoxunuf.pdfIn PDF document text
    • http://mimavuxaxokit.iblogger.org/osrs_agility_guide_2017.pdfIn PDF document text
    • https://xuniruki.weebly.com/uploads/1/3/0/7/130739043/5544103.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378843/normal_5fdd5c00df8c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_602dd782eb7fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475383/normal_5fda9986df904.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379229/normal_5ff27d1c857ea.pdfIn PDF document text
    • https://zeloruzo.weebly.com/uploads/1/3/5/3/135349371/4939190.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dofovomomame.epizy.com/movikunik.pdfIn PDF document text
    • http://zesufes.epizy.com/alto_sax_sheet_music_christmas_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/3572742454.pdfIn PDF document text
    • http://kusefiselarezex.epizy.com/jakifejeluweranozisa.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/free_internet_tv_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/90500096608.pdfIn PDF document text
    • http://genenapukiral.epizy.com/jazifufeguxo.pdfIn PDF document text
    • http://vibesegajepo.epizy.com/jiwonuwaralinexalugagadew.pdfIn PDF document text
    • http://nazozogev.epizy.com/20282913381.pdfIn PDF document text
    • http://kejefutipetube.epizy.com/osrs_mith_gloves_guide_pure.pdfIn PDF document text
    • http://juvisupejigu.epizy.com/staff_training_evaluation_template.pdfIn PDF document text
    • http://fonivez.epizy.com/cateye_velo_7_manual_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/zarivijiz.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_off0000d550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD550 5036 bytes
SHA-256: 7bc9d4ebbda8101b2475ab9c88a272dfe1ae143a676dc42ba7127873aa94e64c
font_01_sfnt_off0000e671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE671 10408 bytes
SHA-256: eb772e3c7c98dcdeaf09c83db2fe1a224a1cfa006da9898e1bff47a795e3d202

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