Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf2809693e17bec…

MALICIOUS

PDF

85.3 KB Created: 2021-04-03 05:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 15ac66681cf44d88909783aaaa7b056a SHA-1: 5d461179cb9c079b8daf93abedbb8ea89d6f5ff3 SHA-256: faf2809693e17becf0fa5c0893836c707291de7d9ab687b221f6476894188687
126 Risk Score

Malware Insights

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

The sample was detected by ClamAV as a phishing trojan and flagged by an ML classifier with high confidence. It contains numerous embedded URLs pointing to external sites, indicating a phishing or redirection attempt. The PDF structure and embedded content suggest it's part of a link farm designed to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 https://zajinet.ru/wix?keyword=conversion+to+non-scalar+type+requested+gcc PDF link annotation
    • https://cdn.sqhk.co/gufezitaxato/JgdtMvU/cbs_sports_franchise_football.pdfIn PDF document text
    • https://cdn.sqhk.co/pulizojiwim/jjpHhfA/gisobovutowalapidovanixib.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/heennBU/problem_analysis_report_sample.pdfIn PDF document text
    • http://ig-about.net/lenalojurh5b06.pdfIn PDF document text
    • http://erkutungotu.com/4404875891710vu.pdfIn PDF document text
    • http://xudefoxalobabif.iblogger.org/return_to_white_plume_mountain_free.pdfIn PDF document text
    • http://naturaitalia.space/core_java_tutorial_naresh_technologies_freedeyvm.pdfIn PDF document text
    • http://life-news.tech/what_are_the_2_bright_stars_out_tonighthfgiv.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/chaalbaaz_movie_songs_pks12im.pdfIn PDF document text
    • https://cdn.sqhk.co/wajewukudino/bidghq4/vuxiwesinopinoxixof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_aaa043087d7f46d2bc88fd4db39a4d8e.pdf?index=trueIn PDF document text
    • http://wegajovekesowor.epizy.com/musabifimawivemorekukix.pdfIn PDF document text
    • http://kukelemut.epizy.com/fisudimuweve.pdfIn PDF document text
    • http://zawuzujuw.epizy.com/classroom_language.pdfIn PDF document text
    • http://fafusew.rf.gd/rationale_of_endodontic_treatment.pdfIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_4af5a1aef1e940d186be59d0319ae5c1.pdf?index=trueIn PDF document text
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_6388f209b33f404588f8e73658e7bb0e.pdf?index=trueIn PDF document text
    • https://9e28b13d-ef5c-4d18-821e-e071a8932918.filesusr.com/ugd/0b0738_7651ee78cbf6418993fe18f1de52c904.pdf?index=trueIn PDF document text
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_d7094842a9b3471883810909c321f785.pdf?index=trueIn PDF document text
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_a9de8e4c95994155bee0b3e7558a1c05.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6B 5464 bytes
SHA-256: 8cf9ec37a420aba61a3d5d1d1e698a4a15e2a8625022d44300582bcfbe334381
font_01_sfnt_off00011f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F1E 11720 bytes
SHA-256: 20a128243d3358c782806273bc0e9ace75899f6fc06bbdc2f03794fe44886bac

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