Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3ab5ebca345aa34…

MALICIOUS

PDF

84.5 KB Created: 2021-09-18 03:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6297475d7fb1ad428527b1672978eca4 SHA-1: 3c2b44c3fe2d84110906b1f13c4ffc2b813fb2bd SHA-256: b3ab5ebca345aa34b38c992906d54b83578ce0ba1bec76d79ecc004da3c0f236
146 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one pointing to a raw IP address, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://chcial.ru/uplcv?utm_term=virtual+app+pubg
    • http://maremania.net/img_pagine/file/sidola.pdf
    • http://sitarofindiamd.com/userfiles/file/voxujonizogufufel.pdf
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/30680039883.pdf
    • http://pro-customer.de/userfiles/file/vawodebuvugilaka.pdf
    • http://nwatchonline.org/userfiles/file/bofuvup.pdf
    • http://creativetechno.in/userfiles/file/napusoxalolaboruseked.pdf
    • http://pnmanagementsolutions.in/uploads/84264597205.pdf
    • https://energooptima.hu/upload/File/lutagepegogubidafe.pdf
    • http://coreaad.com/DreamDataUpload/file/datuwev.pdf
    • http://motolargo.pl/userfiles/file/bavinovirasuxajej.pdf
    • http://140.121.161.111/ckfinder/userfiles/files/25447845590.pdf
    • http://unternehmensberatung-hegenbarth.com/userfiles/file/28005032464.pdf
    • http://ipayon.com/root/FCKeditor/file/74980641191.pdf
    • http://fitnessklub-impuls.pl/uploads/assets/file/71894996975.pdf
    • https://almavilag.hu/files/files/motenif.pdf
    • http://mc-opony.pl/files/file/negeniwatoloza.pdf
    • http://www.siposferenc.hu/html/losedowi.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/b8rmgfbbvdl3lf8buqanodo9tc/kagipodofozevirin.pdf
    • http://penzion-u-zamku.cz/files/file/52488534666.pdf
    • http://77owship.netsociality.com/upload/files/senojivefazovidet.pdf
    • https://mackbeks.com/files/file/48518060413.pdf
    • https://kurek-rowery.pl/user_pict/file/wenakemijale.pdf
    • http://compufoxmail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/tofajaxirolakaxare.pdf
    • http://dyglas.com/userData/board/file/kisaf.pdf
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/1234ea80e4fa1b84b028bf8b37933fbc/71234678007.pdf
    • https://manhalhealing.com/userfiles/file/11546413606.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e588.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE588 16792 bytes
font_01_sfnt_off0000fd9a.bin
fb126d85f19d81dd91cf89841020b14980e5fd9d3d1d50bfc7d4e54ac266ac15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9A 18688 bytes
font_02_sfnt_off00012dc3.bin
c0ce80d1c4a611863d241d2084835c567b864e0159792d9e32b15a7da031611b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC3 10112 bytes

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