Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f65f1ee85fc0fb6…

MALICIOUS

PDF

75.0 KB Created: 2021-01-26 12:17:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a2d5290ac891ef374a4b46e8e96193b2 SHA-1: 4241825a2da8fd93cb31bf11a5eeef65d9ecd8a9 SHA-256: 2f65f1ee85fc0fb678ebed4cf46cf7682261f05f7dcb81ed1f5c8cd6f0d3d504
192 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for redirection to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of numerous links and the 'malicious redirector' finding indicate the document's purpose is to lure users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffmen.ru/aws?utm_term=plasmodium+falciparum+treatment+guideline In PDF document text
    • http://ecoservice-vlad.ru/24374292677c6ob2.pdfIn PDF document text
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/wupin.pdfIn PDF document text
    • https://cdn.sqhk.co/nalomuxe/0uLhcid/repodukilefosubapibofa.pdfIn PDF document text
    • https://numeroluxovuz.weebly.com/uploads/1/3/4/7/134733954/busagakisixo.pdfIn PDF document text
    • http://storezone.info/5700270643682wgi.pdfIn PDF document text
    • http://kosiwixiwumizu.iblogger.org/gonitodixaviwutuzujige.pdfIn PDF document text
    • http://fherixq.com/gorilarogayva5t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476273/normal_5fd892e34e6e8.pdfIn PDF document text
    • https://cdn.sqhk.co/nilimijano/jgc4ihK/cloud_bubble_shooter_game_online.pdfIn PDF document text
    • http://tufataf.22web.org/48047367627.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/vsjd5ge/xobupikozisige.pdfIn PDF document text
    • http://tudovawo.22web.org/goulds_well_pump_guide.pdfIn PDF document text
    • https://fadufavibog.weebly.com/uploads/1/3/4/8/134889314/bcb4150bbc021.pdfIn PDF document text
    • https://cdn.sqhk.co/kajurineg/ibgfFii/nautical_life_game_mod_apk_unlimited_compass.pdfIn PDF document text
    • https://jigugupidutugi.weebly.com/uploads/1/3/0/8/130813301/palobupa.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/SjjGygi/tanglefree_floating_gun_case_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wusipoz.rf.gd/brothers_and_sisters_episode_guide_season_4.pdfIn PDF document text
    • http://bixodog.rf.gd/sql_server_2017_express_complete.pdfIn PDF document text
    • http://palipesokugukux.epizy.com/certify_the_web.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_off0000e5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AC 5476 bytes
SHA-256: 6cf5aad31208a0df11e934589a61ed45affbc60be67a70513cbd161e51b054f1
font_01_sfnt_off0000f835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF835 10724 bytes
SHA-256: 7c76d2f7d8b69446805a8cb60b41b9f2b286525efa3cb182ecd60f93922aa483

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