Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf11bfdde63e0a5…

MALICIOUS

PDF

84.1 KB Created: 2021-09-22 10:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e60b4cd1b836d2a1d41fefe4516c0b2e SHA-1: 2e8a6c71b8f540a89d138031cb55f4104a6b48e1 SHA-256: fbf11bfdde63e0a5cd48e75e2194cdda887f08aee63d4c20123b69f7512a3c30
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with a heuristic specifically flagging it as a link farm on disposable hosting. While no scripts were directly extracted, the presence of many external links suggests an attempt to redirect users to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://philboyd.com/64495959244.pdf In PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613073de3dfe5---balokukisabaxar.pdfIn PDF document text
    • http://investbuild.ru/var/upload/file/tifejexidujetogujiv.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/79818009766.pdfIn PDF document text
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/63359064364.pdfIn PDF document text
    • http://www.mattig-accounting.bg/fisiere/file/72369632699.pdfIn PDF document text
    • https://bike-accessories.supersites.gr/content/ckfinder/files/gobelezawijujavisuturapa.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/saroxemakix.pdfIn PDF document text
    • https://pokereshop.cz/data/file/89674739545.pdfIn PDF document text
    • https://lotusmarinevn.com/upload/files/vunupurozowo.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/golegiwezasaxuvomuteb.pdfIn PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/25651405296.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/bajufuwusuv.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/43203950044.pdfIn PDF document text
    • http://prosefkuchare.cz/userfiles/rigugozusoputuxezageviwi.pdfIn PDF document text
    • http://rentaruedas.com/files/others/12585018133.pdfIn PDF document text
    • https://adikmanis.com/contents/files/wufelo.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/rafefuxekime.pdfIn PDF document text
    • http://discus-rus.ru/upl/file/95395645921.pdfIn PDF document text
    • http://xn--j1aai7d.xn--p1ai/userfiles/file/wuzamulawosiponepep.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/78028863779.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/4764923194.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=beast+iptv+channel+listPDF link annotation
    • 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_off0000e1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C6 10372 bytes
SHA-256: 68dd5d6b3fa6b28c42a0f47179fae14fec9b0d00f399ece419e1b7ef80b7e7b3
font_01_sfnt_off0000f936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF936 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11148 19208 bytes
SHA-256: a0bde08534d9554e94e312c6e8c89d8820592e3e1393fbe6182183dc8318041c

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