Malicious PDF — malware analysis report

Static analysis result for SHA-256 d151acf1752ef7c9…

MALICIOUS

PDF

77.8 KB Created: 2021-09-20 01:31:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 00ec086e9d5577127f03412f899394bf SHA-1: df48ce097d2fedacb07bf6e4154b4cbe63dfa436 SHA-256: d151acf1752ef7c9911a12caa201dd788dab669b5e5e72d0366538a31917aed3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external domains, suggesting it functions as a lure to redirect users to potentially harmful content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm on disposable hosting, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://crewmak.ru/uplcv?utm_term=dungeon+maker+apk+free PDF link annotation
    • http://titusauto.hu/kepek/file/vilojesajibada.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/faa85e56c8ab21500789df7b15485790/45245810239.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/bisejenevawufubezigidimij.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/bezero.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161417be5eedea---85379495665.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/36852597146.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/jevoxilevevujuje.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/28514826380.pdfIn PDF document text
    • https://skywaytravelandholidays.com/ckfinder/userfiles/files/mokusejixuludijojuxil.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/jaxup.pdfIn PDF document text
    • http://wildzipper.com/clients/wildzipper/userfiles/file/28435952907.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/19213171194.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/sozawuwexugod.pdfIn PDF document text
    • http://dga.gr/ILC/img/file/vovugabi.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/wogimajibajetivofa.pdfIn PDF document text
    • https://lyubomiradineva.com/files/file/61815631703.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/91567845093.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/67471217996.pdfIn PDF document text
    • http://viajaconsciente.com/imagenes/userfiles/file/fuwofejojuvaselo.pdfIn PDF document text
    • http://bscartridge.com/pic/pilawolaramuwoni.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-13/20210913070823499131.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/29861155030.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_off0000ca0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE220 18148 bytes
SHA-256: 48b626f4fece261eacf70542d6477c91a1fe2563ba53c1d7a7868b1d5d808e1d
font_02_sfnt_off000111bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BC 10492 bytes
SHA-256: 6d8c5f826b38135fe151a977231db757eb24a3633f8594d518b6bc6c16cb81ca

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