Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcea6213788c6213…

MALICIOUS

PDF

80.6 KB Created: 2021-09-19 10:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c2e25b0a335dd43ac4774ac4112b55d0 SHA-1: 74f078f5a5e02617706980b96089c4255cc8b548 SHA-256: fcea6213788c6213fb62df1c126f532cebeb2df7d17eef564a24d422ff26ad4a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to disposable hosting domains, a common tactic for phishing and malware distribution. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an intent to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://vsetinrally.cz/userfiles/file/fopemufu.pdf In PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/runakaluwad.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/64072249781.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/jowinojavovowojoresawo.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/vulurasabimuruxojomivanaf.pdfIn PDF document text
    • http://laiksmodalux.lt/app/webroot/uploads/userfiles/files/dukuzogipuka.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140bc7f31bfd---78456610709.pdfIn PDF document text
    • http://olynskiconstruction.com/pics/file/81225298925.pdfIn PDF document text
    • http://pickup-ws.com/userfiles/files/64848158804.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/kebefuvud.pdfIn PDF document text
    • http://newkontakt.ru/userfiles/images/file/walidajofijakumigaviku.pdfIn PDF document text
    • http://pribatu.lamilagrosaimport.com/images/files/dedeladubi.pdfIn PDF document text
    • http://ombs.ru/uploads/files/pejijubovazuzavisaga.pdfIn PDF document text
    • http://falegnameriacastiglione.it/userfiles/files/dejejaremasodevu.pdfIn PDF document text
    • https://mlspoland.co/files/file/55418742920.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161327ee405d10---18836925470.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/80918342402.pdfIn PDF document text
    • http://renknh.com/ckupload/files/lubofudabivesux.pdfIn PDF document text
    • https://menu2uplus.com/images/file/fegused.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/28687182845.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/92215617325.pdfIn PDF document text
    • https://uslugiinzynierskie.com/eurostyl/photos/file/76322646167.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/66278991226.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=samsung+gt+i8262+custom+romPDF 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_off0000d343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD343 18384 bytes
SHA-256: 9f1b255a61b0ea3e0d35740803415d80c5d8dce3438b2a03531e6dbfed70c198
font_01_sfnt_off000102e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E8 11064 bytes
SHA-256: 756d9ad9e23d18e9897aadf0bdbaf5aa8fc0b282a8a4e4b0a330003e0a8a3ce4
font_02_sfnt_off00011cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1