Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e3009223cdcd13b…

MALICIOUS

PDF

77.8 KB Created: 2021-09-19 02:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 184c9a8e54d46a41295bbd94ec7082d9 SHA-1: e2ca47f7586b014a95fbb4e779cf11ea05eb688b SHA-256: 7e3009223cdcd13bb7c48fba5cc45a3e5008b595c59164925298961cba08a287
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many of which appear to be part of a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded URLs indicate a likely spearphishing attachment used to deliver a payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://crewmak.ru/uplcv?utm_term=movies+before+avengers+endgame PDF link annotation
    • https://repetitorebi.ge/userfiles/files/sapixisedixozanujuvu.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/41121647547.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/rupeve.pdfIn PDF document text
    • http://www.kymenhome-etsinta.net/tiedostot/files/zabejabapeza.pdfIn PDF document text
    • http://rrmkaryacollege.org/rrmkarya/userfiles/file/vasadazedumegelovibabus.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613939c729432---fekimezisebolo.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/69419208494.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/58504200840.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/2537901779.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/20272584083.pdfIn PDF document text
    • http://www.aragonemprendedor.com/userfiles/files/vepulirepajudomamob.pdfIn PDF document text
    • http://sushibelovo.ru/files/wogezopuxejexofabelokilo.pdfIn PDF document text
    • http://linza-market.ru/upload/files/dotimosesexonegufe.pdfIn PDF document text
    • http://ateliergermain.org/sites/default/files/file/folusifixij.pdfIn PDF document text
    • http://istvietnam.com/rich_editor/file/rowojixewudiselojavujuv.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/xiriwuvixewutatuzejiraxa.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/bububakele.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/nesigowiguxo.pdfIn PDF document text
    • http://newgatedesign.com/Images_upload/files/42471838165.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161375970cd889---norabaxasagagas.pdfIn PDF document text
    • http://clinicaveterinariasangiacomo.it/userfiles/files/8903223062.pdfIn PDF document text
    • http://sweepinstyle.com/userfiles/file/66424230310.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_off0000cc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC06 17336 bytes
SHA-256: 6de65b0f9eb196abbe6b8a3a12062ad6e807cda92820c582cae9bf36d6d4e37e
font_01_sfnt_off0000f8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E3 10752 bytes
SHA-256: 58e9c19392f396881d6062289111af4b39af392e086d6bf45461531586e793b1

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