Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff6c20e9f19e05d…

MALICIOUS

PDF

76.2 KB Created: 2021-03-15 20:06:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6dc9047ac765b13a0e49ba09f83a4807 SHA-1: b3ddf5b31e2b06446ab8f39894ab46dfb0fa6868 SHA-256: 6ff6c20e9f19e05d109d2ca1175af37242dc44b30d9fe61432b19fab3810b143
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on potentially untrusted hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs like 'https://lozipotod.ru/wix?keyword=cipm+exam+study+guide' further supports this, as it likely serves as a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=cipm+exam+study+guide PDF link annotation
    • http://xakidofe.sportsontheweb.net/virebaxakenibo.pdfIn PDF document text
    • https://cdn.sqhk.co/visobipibe/Bnahgjj/talking_points_parent_letter_english.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/other_blood_groups.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425737/normal_6015869261df2.pdfIn PDF document text
    • https://cdn.sqhk.co/xisalaximel/hrijIjv/71920594911.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481058/normal_5febe5c3f050e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420745/normal_5ff309fe61745.pdfIn PDF document text
    • https://cdn.sqhk.co/matapolid/5BjhXoE/game_of_summoner_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404488/normal_5ffa61cc4f2ff.pdfIn PDF document text
    • https://cdn.sqhk.co/vutexexukus/AhahhOM/64295701574.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/46626767712.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/hihhcMa/simple_present_tense_listening_activities.pdfIn PDF document text
    • http://wazepewazivulil.mywebcommunity.org/25404299253.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/Gig0Eif/tubemate_apk_download_for_android.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/bajujidubelubet.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/blhDzgj/87936013162.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://soranodabiwegi.myartsonline.com/53938576368.pdfIn PDF document text
    • http://ruzofugeru.myartsonline.com/portugus_para_todos.pdfIn PDF document text
    • http://zidabisix.epizy.com/payback_game_for_android.pdfIn PDF document text
    • http://lopafulobitap.atwebpages.com/33977623278.pdfIn PDF document text
    • http://siwodonodefofo.epizy.com/venoref.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/cute_heart_drawings_in_pencil.pdfIn PDF document text
    • http://leranijaw.rf.gd/bluetooth_for_windows_10_driver_free.pdfIn PDF document text
    • http://vogilidiniluti.rf.gd/wing_chun_tutorial.pdfIn PDF document text
    • http://budunasetixap.epizy.com/fsae_cost_report.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_off0000ed8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8A 5224 bytes
SHA-256: b7ca484144675f3ef73f5315aa9e7ce2873381d49b3cea9511aa3e234dabd445
font_01_sfnt_off0000ff4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4C 10596 bytes
SHA-256: 5c80b2477bd6684cfb1ea837642c9d75ae209c41474635973f04dbd3b3df87eb

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