Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c369e83a5f5d616…

MALICIOUS

PDF

67.7 KB Created: 2021-02-22 19:33:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f88c4ead18a31967cc760c9654d0a1c9 SHA-1: 257ef73325323afd2e0627d864d4a97298f7fcd4 SHA-256: 0c369e83a5f5d6168e0f4f5936f6fb5f0652041f9e98710bfd8449ae3208a099
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure, likely attempting to redirect the user to a site for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/123?utm_term=fe+review+manual+pdf+civil PDF link annotation
    • https://cdn.sqhk.co/vegedusovo/iaHgfgc/coronapp_colombia_descargar_apk_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/g1GjjJQ/restart_hp_laptop_in_safe_mode.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500895/normal_60059235b1ee8.pdfIn PDF document text
    • https://cdn.sqhk.co/gikokimofegi/DAHWhhu/1103832503.pdfIn PDF document text
    • http://govnososal.xyz/firefox_older_version_for_windows_102sf3h.pdfIn PDF document text
    • http://menbp.online/mf_65_serial_numbersjha0t.pdfIn PDF document text
    • https://cdn.sqhk.co/vovomafejuwa/hbgeiVH/bubble_witch_saga_3_hack_online.pdfIn PDF document text
    • http://reduslim-europa.site/kunapigofagufhv064.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424024/normal_5ff8b71e78bfc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412909/normal_5feb5d51bc6b9.pdfIn PDF document text
    • http://muzoc.xyz/bokawubmlguo.pdfIn PDF document text
    • http://circulyarkadigital.xyz/230480708444dwr6.pdfIn PDF document text
    • http://spoonnumberone.xyz/asus_rt-ac87u_router_specs33xfi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481272/normal_6001ba682e328.pdfIn PDF document text
    • http://edarudost.online/zemeluvukajoraluxofalok6uqgw.pdfIn PDF document text
    • http://trastenmyqort.online/jujizixudaw9eav.pdfIn PDF document text
    • http://italystore.pro/bubsy_sega_game_freeyi6dd.pdfIn PDF document text
    • http://afracheat6.xyz/glycemic_index_dietah128.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujiwexamofone.rf.gd/lixugesovufofova.pdfIn PDF document text
    • http://susupufewowe.epizy.com/zotakiwipu.pdfIn PDF document text
    • http://banugigo.epizy.com/gedumizagunosamedukuwidal.pdfIn PDF document text
    • http://zonadomafi.rf.gd/cdburnerxp_64_bit_windows_10.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DF 5232 bytes
SHA-256: bc9fc41069ab6671edeac354f1177a21d82061497f18306fb78a2ca0f444be60
font_01_sfnt_off0000dba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA8 10704 bytes
SHA-256: c1dd288310b34df8820e93a8a913c91bd29d59c244840409a146a872d17c1383

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