Malicious PDF — malware analysis report

Static analysis result for SHA-256 0108289e07f3fa2b…

MALICIOUS

PDF

78.8 KB Created: 2021-04-01 17:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b2cc84b435f1c3668ffdd94398962af SHA-1: 28cf17aaf6841828f0a796913fe9ab26a6a98320 SHA-256: 0108289e07f3fa2b389dbb1e0eb18000110638036981d36d6e133989a9f139e6
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript T1190 Exploit Public-Facing Application

This PDF document was flagged by multiple heuristics and an ML classifier as malicious. It contains numerous links to disposable hosting, suggesting a link farm designed to host malicious content. The 'SE_REMOTE_SUPPORT_LURE' heuristic indicates the document likely attempts to trick the user into installing or running remote support tools, which are often abused by threat actors. The primary IOC is the URL used in the lure, which is likely a staging point for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://resalured.ru/strik?utm_term=advanced+ms+excel+2007+tutorial+pdf+free+download
    • https://cdn-cms.f-static.net/uploads/4484820/normal_6014f22b8b011.pdf
    • http://mojuluxemo.22web.org/what_is_the_premise_of_resource_dependence_theory.pdf
    • https://cdn.sqhk.co/dujagazatad/hfxgdZj/best_video_editor_app_windows_10.pdf
    • https://xiforamuti.weebly.com/uploads/1/3/4/6/134611992/2587124.pdf
    • http://degitowexara.iblogger.org/53942799866.pdf
    • https://cdn-cms.f-static.net/uploads/4476274/normal_5fda4979702bf.pdf
    • https://kumobavogi.weebly.com/uploads/1/3/2/3/132303339/seletokolomazimoze.pdf
    • https://duwiwobejul.weebly.com/uploads/1/3/2/7/132740292/2305776.pdf
    • http://maporirunigis.22web.org/pewuvonetapuwigujudase.pdf
    • https://cdn-cms.f-static.net/uploads/4457281/normal_605110460fcad.pdf
    • https://cdn.sqhk.co/mivuxakadu/gLjh2pe/84271842382.pdf
    • https://static.s123-cdn-static.com/uploads/4428062/normal_5ffba8560ad55.pdf
    • https://static.s123-cdn-static.com/uploads/4409395/normal_6002ef2bb34c0.pdf
    • https://cdn.sqhk.co/xilelawemu/ggjhhh0/best_meal_night_before_a_soccer_game.pdf
    • https://taxusuxegob.weebly.com/uploads/1/3/3/9/133997122/wojoje-pujoxakigo.pdf
    • https://cdn.sqhk.co/tebefaravuz/Qqieics/road_signs_turn_left_vector.pdf
    • https://cdn.sqhk.co/bumajanivosi/hzgeojV/blackpink_lisa_plastic_surgery.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jijabivu.epizy.com/mizagetajizidufane.pdf
    • http://temitugefowe.epizy.com/maven_generate_test_coverage_report.pdf
    • https://uploads.strikinglycdn.com/files/4c1b3b66-b0b0-4858-8c5a-7f63cd652816/kixavapatuwimofepe.pdf
    • https://uploads.strikinglycdn.com/files/5967ce37-e331-4d7d-9bc2-194f1d1a56ab/how_to_deactivate_deep_freeze_with_password.pdf
    • http://silugat.epizy.com/adverb_phrase_and_adjective_phrase.pdf
    • http://moberasar.rf.gd/supply_chain_management_mba_programs.pdf
    • https://uploads.strikinglycdn.com/files/057763d6-f303-4d6a-94fa-a8b03e18d2ef/87266491021.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f314.bin
9e70230b66085c0ea75b8e8aa6367686769acaba5056f12127a66d13d99a766b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF314 5864 bytes
font_01_sfnt_off00010718.bin
593f2aad384e73cb6486c262c215ca1ba443c394b95f10ec91382e6ab664e20a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10718 11128 bytes

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