Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c04706a489b90a3…

MALICIOUS

PDF

99.3 KB Created: 2021-06-26 06:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 911a1a0822d0f21b961f1e07fb404cde SHA-1: 8bb6ef9ab8f5c23a8151bf81581b249a0ca47e5e SHA-256: 0c04706a489b90a309629382c9649a0e3d071c16160fbd90c17fa41f6e5d70b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of external URI heuristics and link farm indicators strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggmtc.net/userfiles/files/poxoxegofunegi.pdf
    • https://personnelcle.com/userfiles/file/zoketuroxosefazen.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe8d4a1829---febukefagodexiguxafis.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b83102f14---sosilom.pdf
    • https://asset-books.com/userfiles/file/karateduwo.pdf
    • http://fullx.net/files/bedafusanexipage.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/ud9vonvlferrm4sucr3o9o1gdm/5763980296.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac259b521e---36024696360.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719079bc5cc---vagilarabeg.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c49bcf44aed---76620763983.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b56f4c037---goriperijesurotuda.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/gankdvp92b3rqnub4ihuk3npp4/ruzasoweduwiluvagome.pdf
    • https://detmers-kontejner.hr/files/68517576601.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab68ad583a---31796050582.pdf
    • http://fashioneducation.ru/userfiles/file/faxisagusafufu.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/nkciiekv1ieh0nqu8u5n3im6g0/95024971127.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/c36dfd330a33e8b1c6e3dd8b4da7a7ad/lasutofedutazi.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093025c48ba7---gozasazulafiziligekazige.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/30f1d96523c7631442584a1e0391db8a/ligevod.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/1hohth0fp1bibl0n37v14kosm6/22792206032.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb5989a576---fazugib.pdf
    • http://paillasse.hu/userfiles/file/73295459177.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=12+laws+of+the+universe+explained
    • 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_off000123a2.bin
7e578be337e2c7e2468eade15916fed5b1e72e8cd9003a24dcc0bef84dea9d14
pdf-font-stream PDF embedded font (sfnt) at offset 0x123A2 11024 bytes
font_01_sfnt_off00013d65.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D65 16792 bytes
font_02_sfnt_off00015577.bin
c883cf00932b4548694aa7ceca6f5b1a0308c9794c99a00b020bc62ada027436
pdf-font-stream PDF embedded font (sfnt) at offset 0x15577 16508 bytes