Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f9fad666bd23d7…

MALICIOUS

PDF

75.9 KB Created: 2021-09-06 16:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e0eb79c5cc0c6ace29bafada8446275f SHA-1: c22229d530fff7b9293eb265d2a2f5b445df8f52 SHA-256: 12f9fad666bd23d7728006a41a3e19d82b976016bb63bcb2da73b706baa09c54
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://infrive.ru/uplcv?utm_term=pahadon+ka+beta+urdu+pdf PDF link annotation
    • http://www.irrv.org/uploads/files/sodukozofajutib.pdfIn PDF document text
    • http://lowndes85.com/clients/d/d3/d39312ffd46aa2fbcc4e4de04d96a17f/File/9017728870.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/fd61cedfa483edab4ddc9cc644b626bf/legoferurigupiluralem.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/90663297674d8c81ef33aaba967c58d2/kikitusufepezonofo.pdfIn PDF document text
    • https://waelfawzy.com/userfiles/file/In PDF document text
    • https://odontologosmalca.com/images/userfiles/file/53552230855.pdfIn PDF document text
    • http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/80415966151.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099653b3befd---towogulowiduboki.pdfIn PDF document text
    • http://avtokapriz42.ru/userfiles/file/27705143959.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/9ljpa7vm7e4ke9sf6mm0c70433/pivukukozigodave.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/sawalogudorovewivetawa.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/u335ikb5sbqlvl6bs8h1bqccq7/fanejodipek.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608f02286d95f---mezotujifogurafalexigarip.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1610d38e47fe32---madivakux.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160757ba8ea524---somejopijamatobojedefejos.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/58480994056.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/64843615395.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16086dc5545745---71206649844.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081941139fb0---vepawajemopowibarus.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/dulomojamijowi.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA53 10624 bytes
SHA-256: 580c4b0b4a391763cd2092215a574792af8e7a157acb33e90ca2c0f2a18a35d4
font_01_sfnt_off0000d24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5E 21436 bytes
SHA-256: e067823629e0e23c8f77f507f93844c71022bdde68758614523e5468a54cd547

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