Malicious PDF — malware analysis report

Static analysis result for SHA-256 208fd66332a306d3…

MALICIOUS

PDF

80.0 KB Created: 2021-03-29 06:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b1c65f464df931c7f2f7e646c3cc3bbf SHA-1: cdb2c2a9c2b93bf97a70bb9b9d7aad15a560e46e SHA-256: 208fd66332a306d38b34ec5776c4984ec58f53d2ed6c8b206e6b504c2479b1ce
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary focus on directing users to `https://mezovuduw.ru/award?keyword=cost+accounting+multiple+choice+questions+and+answers+pdf`. The document body, though heavily obfuscated, appears to be a lure related to search results for accounting questions. The presence of many disposable and potentially malicious domains suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://mezovuduw.ru/award?keyword=cost+accounting+multiple+choice+questions+and+answers+pdf PDF link annotation
    • http://particuliers-societegenerale.xyz/debogukofotepeladi011od.pdfIn PDF document text
    • http://msertis.xyz/pakusegomi8sw.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CFgdiND/wobokosomapodotiw.pdfIn PDF document text
    • https://cdn.sqhk.co/zeboxuze/dgJhdgh/format_for_experience_certificate_for_pharmacist.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/shjw9pv/80484793578.pdfIn PDF document text
    • https://cdn.sqhk.co/motuxeneb/bhfgdYn/the_eagles_greatest_hits_full_album.pdfIn PDF document text
    • http://dagoxijopiveb.22web.org/simon_says_commands.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/bjbPvgc/top_tags_for_instagram_reels.pdfIn PDF document text
    • http://variwat.22web.org/94323094034.pdfIn PDF document text
    • http://sipujofavotad.iblogger.org/think_big_ben_carson_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/eijhcBK/red_ball_4_game_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/hjFhBH9/vevexamuxexesoponib.pdfIn PDF document text
    • http://douchehq.xyz/dotelogatekigbybr.pdfIn PDF document text
    • http://xutiwavu.iblogger.org/mavupoxa.pdfIn PDF document text
    • http://guwodela.iblogger.org/37037686591.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwasazafu/5ghcYcc/51759088177.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/yfwggEI/26795748037.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kagiwabiluwotel.epizy.com/53009496047.pdfIn PDF document text
    • http://xadupozitolewoj.epizy.com/difference_between_endotoxin_and_exotoxin.pdfIn PDF document text
    • http://melewurimepuja.rf.gd/sekonic_l-308s_manuale_italiano.pdfIn PDF document text
    • http://nexolep.rf.gd/22074387748.pdfIn PDF document text
    • http://karajifaderiwow.epizy.com/10997182475.pdfIn PDF document text
    • http://zizuzilo.epizy.com/business_plan_for_ecommerce_startup.pdfIn PDF document text
    • http://relumewamamit.rf.gd/70345436080.pdfIn PDF document text
    • http://rupilozomu.epizy.com/cecelia_ahern_perfect_download.pdfIn 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_off0000f8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E0 5692 bytes
SHA-256: 9f1ff381ad69944560af3e323c383df0b6c92c615b4e703ccf431cc4a25526fe
font_01_sfnt_off00010c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1B 11160 bytes
SHA-256: 285793e93cb8760ce2017e06f33026865eeaba4e0818c3dc26679b0165c94e28

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