Malicious PDF — malware analysis report

Static analysis result for SHA-256 d666e1141de52b8d…

MALICIOUS

PDF

126.7 KB Created: 2021-02-19 13:06:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e004bbc0ce1b94c2fa58ae186f7ef08 SHA-1: d8450c4f97a236d72c82b885dc382d45271cc779 SHA-256: d666e1141de52b8dcea5c330ea51a63dacd2a42f6674f26d97340e3995d2abda
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable domains and acting as a link farm, a common tactic for distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely a phishing page or a malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/123?utm_term=kenmore+water+softener+repairs
    • https://cdn-cms.f-static.net/uploads/4456712/normal_600f608a01b40.pdf
    • http://study-english-04.space/bubexojezedoxoxomozupawehn3v4.pdf
    • https://cdn-cms.f-static.net/uploads/4486521/normal_602ad2d89d244.pdf
    • https://cdn.sqhk.co/lovojekaboxi/ieGAVTs/duguwovenonegil.pdf
    • https://cdn.sqhk.co/torujazelome/JGhagTW/kiwamovotu.pdf
    • http://idealslimitaly.site/borolugewuzavefusetivezvlpwq.pdf
    • http://biomanix.best/siemens_hearing_aids_prices_in_south_africa7tzew.pdf
    • http://13millions-warzone.store/cbs_sports_fantasy_football_rankings_tiersg1ah3.pdf
    • http://xupevagadozojad.22web.org/molate.pdf
    • http://nely.xyz/bedanejidudn.pdf
    • https://cdn.sqhk.co/raxulaxesob/gdhdpDG/software_update_ipad_2_ios_10.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pulujolatepuv/awake_2007_full_movie_free.pdf
    • http://tofezaniv.rf.gd/69989874818.pdf
    • https://s3.amazonaws.com/batoragubukepo/61148808033.pdf
    • http://dakawarinuku.epizy.com/professional_references_document_template.pdf
    • https://s3.amazonaws.com/pivetuzadujo/salut_d_amour_cello_sheet_music.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_off0001b5c5.bin
3a06e89795ba6fc568b9cbeb67be8e60eeca12a39677a88cead1ee29ec84b16b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5C5 5076 bytes
font_01_sfnt_off0001c70a.bin
50b9cad9e0e692ef90402413b72abc4c95472fbfd9ccc1aa39165fa35bc4124c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C70A 11124 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.