Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a2974bcad86345…

MALICIOUS

PDF

82.8 KB Created: 2021-09-12 02:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9d4a5d600ac3f6538ea12c584010bd92 SHA-1: d8a0a2fc58a7921ae3d15bdb17953d177bf93d5d SHA-256: 03a2974bcad86345bbd5d6f1499d3afaffddaf9214f8642a181f50d0785af73b
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. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent through redirection to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://archbot.pl/files/file/semitusebiwuwikop.pdf In PDF document text
    • https://www.nitdgp.ac.in/uploads/userfiles/files/55723766238.pdfIn PDF document text
    • http://rrmkaryacollege.org/rrmkarya/userfiles/file/tukifiriwoxagezogenino.pdfIn PDF document text
    • http://greddy.com/admin/common/ckfinder/userfiles/File/xepekapuzuboj.pdfIn PDF document text
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/demiwinojiwiwipeboguz.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/68659100062.pdfIn PDF document text
    • https://promenade-perpignan.com/userfiles/file/xekadejetune.pdfIn PDF document text
    • https://clinicaalcantara.es/sites/default/files/userfiles/file/rujutulapijipukut.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613424e580998---mumovefunebiwubuvuwij.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109042311432415.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/wulajasaxu.pdfIn PDF document text
    • http://drsrkbedcollege.com/ckeditor/ckfinder/userfiles/files/48779114794.pdfIn PDF document text
    • http://burmeseburmilla-allevamento.com/userfiles/files/71039407663.pdfIn PDF document text
    • http://tochuchoinghi.org/files/ziposi.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/57509309032.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/35386795353.pdfIn PDF document text
    • http://tabletopad.com/images/file/sosagupotisez.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/56979386874.pdfIn PDF document text
    • http://quaisetoiles.fr/img_pages/file/suduxonumakilitidaxegodab.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/kawimipefikukuzevagusel.pdfIn PDF document text
    • http://tyextractor.com/d/files/52042630279.pdfIn PDF document text
    • http://leeharringtonhomes.com/userfiles/file/famaralomel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=cambiar+dns+android+sin+rootPDF 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_off0000dc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF414 19368 bytes
SHA-256: f995f9eb150b1df60bbf7ada3cc8b5436edd2c86472d65b44d9bfa415a7dcdcb
font_02_sfnt_off000126ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AE 10400 bytes
SHA-256: 716c161c62f88d9842c79afe413a887ff6becdf47c919b60e5a40dd7a3d51803

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