Malicious PDF — malware analysis report

Static analysis result for SHA-256 f632a2cc697e3b43…

MALICIOUS

PDF

76.8 KB Created: 2021-03-06 02:15:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ce977e9561fa97ea456b21547f65eb7 SHA-1: 13b167eab3bc7c60d855aa90ec2e8e2a13ac47e9 SHA-256: f632a2cc697e3b43f9eec674fd923590d1a89f65491101746f7b92b8381b3978
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links to disposable domains, masquerading as information about air compressors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users 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://xajibur.ru/123?utm_term=what+kind+of+oil+for+my+air+compressor
    • http://harkateine.fun/88561251998u3ym2.pdf
    • https://devatokur.weebly.com/uploads/1/3/2/6/132683056/a650306ebd1de.pdf
    • http://euroshopmn.space/dekupezowuletelazagipazauexui.pdf
    • https://cdn-cms.f-static.net/uploads/4402960/normal_6013bbe86d20b.pdf
    • http://libertinemodels.com/27604707770divo6.pdf
    • http://idealica-ufficiale.site/pokemon_dark_rising_pokemon_locations1mdcx.pdf
    • https://mevimozow.weebly.com/uploads/1/3/0/7/130776561/xofob-lesasud-muned-tewoduvodadat.pdf
    • https://cdn-cms.f-static.net/uploads/4415930/normal_6013050e4fc7e.pdf
    • https://static.s123-cdn-static.com/uploads/4426543/normal_5fe31880d5e79.pdf
    • http://shopmzm.site/debunabusy8i2v.pdf
    • https://fexegidonowagi.weebly.com/uploads/1/3/5/3/135325594/8cd5c2ddbec73b.pdf
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/nujaxajofalogogabaro.pdf
    • https://cdn-cms.f-static.net/uploads/4369191/normal_60353fa9a2586.pdf
    • http://instas.site/bhojpuri_whatsapp_comedy_video_song8vcil.pdf
    • http://musc-media.xyz/palugogewejaxaxavovegasom55fz.pdf
    • http://fb-copyright-help-from.com/les_miserables_summary_bookr0bnx.pdf
    • http://casbah2point0.com/13976235077pkm0j.pdf
    • http://formulamoney.top/60071323065hnflz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nitajosasa/fudurodifano.pdf
    • https://s3.amazonaws.com/gewisetug/naxirifisugazenuvodamuvoj.pdf
    • https://s3.amazonaws.com/mejifavo/aston_martin_vantage_manual_or_automatic.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_off0000ee89.bin
d3d181fceb43824944e0665ab6111a211b983014ed368b5093c9d024da1abfd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE89 5576 bytes
font_01_sfnt_off0001016c.bin
a493a024487eb717bedfca6778bcd2d9c56c653874b6c5a1f016efe1fc03b883		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1016C 10740 bytes

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