Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e14282e36b859a…

MALICIOUS

PDF

75.1 KB Created: 2021-09-23 04:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bff0bf089e2138d2f38103064bbe2e1e SHA-1: 61e00aeb399f3a06a98bda5f439b2bf312f527ea SHA-256: 15e14282e36b859ab17ed0e2287d13109a7671a77a2d972412e2bf36a576dbf7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm hosted on disposable domains, with numerous embedded URLs pointing to potentially malicious content. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the link farm hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://garglob.ru/uplcv?utm_term=mx+player+background+play PDF link annotation
    • http://amsasecretariat.fr/userfiles/file/35503523155.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/50096138868.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/sosokibeju.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/pinon.pdfIn PDF document text
    • http://mwcapital.net/ckfinder/userfiles/files/57803382983.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/bazorobigapitamunufopisok.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/49259687240.pdfIn PDF document text
    • http://realcomfort.ru/content/upload/file/ruvominaguranaxoludikexe.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/warevowepetisuf.pdfIn PDF document text
    • http://decorstore.eu/upload/file/79340557926.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/6b4927536ee6be361f1ba09d3f178f6c/semejenotebu.pdfIn PDF document text
    • https://sonerofset.com/userfiles/file/32341443429.pdfIn PDF document text
    • https://alshuka.ps/ckfinder/userfiles/files/jifawovoluwibida.pdfIn PDF document text
    • http://jpiano.net/userData/ebizro_board/file/duxatovamogo.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/9463738860.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/wifivu.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/45561253755.pdfIn PDF document text
    • http://www.saletime.gr/admin/fckfiles/file/sagivo.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/xaxikoxefi.pdfIn PDF document text
    • http://showdoimovel.com/files/files/43465917419.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613495ce4a99e---mujujivurekewiferoguka.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/09/files/210913221124.pdfIn PDF document text
    • https://duongthuy.net/userfiles/file/sujefesijupawanefiru.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_off0000c14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC14B 17228 bytes
SHA-256: e15487e47a57f6c50484e751d6f2b0ebcff98ec603ae628ed57f513ae2953bf3
font_01_sfnt_off0000ee42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10659 10872 bytes
SHA-256: bdf0a2acf2e352e09283c2fed74a82e6a16a56b736e8c83bf21ce8442a469718

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