Malicious PDF — malware analysis report

Static analysis result for SHA-256 0309e3f36680c871…

MALICIOUS

PDF

69.7 KB Created: 2021-09-26 21:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0270b34e561412ae2947ce840abab86c SHA-1: 9df2da2013c9abbf0ec10bfce04de0869392f752 SHA-256: 0309e3f36680c8715c1c02236b004785edf095897d279bd0d3ac0e4345d21004
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a high ML score and ClamAV detection as a phishing trojan. It contains numerous embedded URLs, many of which point to suspicious domains and appear to be part of a link farm designed to redirect users. The presence of these links suggests an attempt to direct users to malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://eros-arena.de/eros/userfiles/file/ziregejikaxelilur.pdf In PDF document text
    • http://canhtoanland.com/upload/files/30528458820.pdfIn PDF document text
    • https://ice-group.pl/userfiles/file/jidisubipodabokuxak.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/16803792657.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/91284511766.pdfIn PDF document text
    • http://weforyou.it/userfiles/files/89741400775.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161453fa585967---namofaxufilif.pdfIn PDF document text
    • http://flamefitnessstudio.com/cewit/images/file/feridaxame.pdfIn PDF document text
    • http://abnig.friendship-match.com/upload/files/54602989538.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/tetafezuwuwarumugak.pdfIn PDF document text
    • https://resicolor.com/upload/files/95927924236.pdfIn PDF document text
    • http://parentini.it/userfiles/files/98483852900.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/aogpl0atdrudsvuasv1ignq6ch/zipejatazapuvisekonej.pdfIn PDF document text
    • http://sperrincaravans.com/images/file/78733836077.pdfIn PDF document text
    • http://ezclasssites.com/var/wwww/dev-ezclasssites-com/data/files/jaxanugipig.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/85789138026.pdfIn PDF document text
    • https://vr-spagna-20.effievirtual.com/galeria/files/69264781964.pdfIn PDF document text
    • http://cathugo-yachts.de/res/wysiwyg/file/51477225815.pdfIn PDF document text
    • http://drivingtesttips.ie/fckeditor/userfiles/file/53211821849.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/tojoba.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jomejabufonemofufisetu.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/patakiw.pdfIn PDF document text
    • http://vps73.juicy-group.com/editor_upload_image/file/9723015691.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=best+mooc+coursesPDF 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_off0000b1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B9 10140 bytes
SHA-256: c865b2c1f39cb9fb404ab33c15c9f0631ed3cad66d89dde4ab35f627fd6e7a3a
font_01_sfnt_off0000c87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC87B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08D 15936 bytes
SHA-256: db4c48cbec9d0ce54a634b9a499c335360b1744b0f6ccbfaa4fd7aaa9506650b