Malicious PDF — malware analysis report

Static analysis result for SHA-256 6145312dab4b1f57…

MALICIOUS

PDF

70.6 KB Created: 2021-09-09 20:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2b23d78f0915d9da0d1e5d41d0c574a7 SHA-1: 9ed5ca62c42494221e9653694780aa70b0cb4b61 SHA-256: 6145312dab4b1f572bea28245614743b151dab5dd7cf5aab8364bb653c52f55a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs that point to disposable domains and are structured as a link farm, a common tactic for phishing or distributing further malware. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a non-clustered link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://laborke.ru/uplcv?utm_term=admin+apk+among+us PDF link annotation
    • http://ccsl.asia/files/gujokotuduvujugezug.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/22707493870.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133be6747844---18542100651.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/wiputevomowatudeb.pdfIn PDF document text
    • http://mkbeauty.vn/luutru/files/2246503971.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/divazalaziji.pdfIn PDF document text
    • http://didula.ru/img/file/fikuf.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16137e3b27290b---56173184096.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/lomagonenogifes.pdfIn PDF document text
    • http://preiss.at/upload_files/files/11768771430.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/59890686316.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/mokup.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/52269052149.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/8145136743.pdfIn PDF document text
    • http://sweet-sugar.de/images/uploadedimages/file/57526709524.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/93117382876.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/86993255673.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/suxasa.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/40068740230.pdfIn PDF document text
    • http://arablift.net/userfiles/file/sabupokejapagogizokozoz.pdfIn PDF document text
    • http://chamdure.com/DATA/files/5294271713.pdfIn PDF document text
    • http://nikkenj.com/userfiles/file/2214644928.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/mofosivoketenujiva.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_off0000b39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB39B 10532 bytes
SHA-256: 62dfd3c634d7e0da903c5e07d2a7db6c81e57d78b2f62bb9a156a9ccf970f773
font_01_sfnt_off0000cb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE363 16380 bytes
SHA-256: 5a0f302c57d5ca62782ce9da60147bd54b3c236ef6d4fd355e11142f3983475e

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