Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0b770b893b2bb5…

MALICIOUS

PDF

77.0 KB Created: 2021-03-11 01:16:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d9f7537d61f25aca686591e99bfa8ad SHA-1: b5e12a2e7a5527fc591897ee1cab3d0701525220 SHA-256: 7e0b770b893b2bb5060e51ec52962a0b43925b3bd301a2f84005b32c491d9399
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a phishing/malicious document. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=weekly+activity+schedule+pdf
    • https://jivenikovo.weebly.com/uploads/1/3/4/3/134308789/wetox.pdf
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/povatiwe-dibamo.pdf
    • http://mujubow.getenjoyment.net/octavia_butler_books_made_into_movies.pdf
    • http://dorulezebum.sportsontheweb.net/its_never_easy_to_walk_away_let_him_go.pdf
    • https://rizibibaruf.weebly.com/uploads/1/3/5/3/135383358/fuxirerofazitenozuj.pdf
    • http://vudifabofugejij.medianewsonline.com/immunization_schedule_in_ghana.pdf
    • https://cdn.sqhk.co/malevevipali/bihcGhf/compare_rechargeable_toothbrushes.pdf
    • https://famotufenimuz.weebly.com/uploads/1/3/4/1/134132127/sujamugi.pdf
    • https://rogasiwenebagan.weebly.com/uploads/1/3/1/3/131380029/janeregumenal.pdf
    • https://narepugajud.weebly.com/uploads/1/3/0/7/130775299/xelibaxasusataz_sitexevirobewa_goxevixogesi.pdf
    • https://pukogapuwobar.weebly.com/uploads/1/3/4/3/134307851/kasinexanux.pdf
    • https://rezilatepupegox.weebly.com/uploads/1/3/5/3/135318796/56dec2.pdf
    • https://juwavade.weebly.com/uploads/1/3/4/5/134526694/giminewitutelut_jasex_pujip.pdf
    • http://tezibif.mygamesonline.org/holiday_math_puzzles_middle_school.pdf
    • https://cdn.sqhk.co/vimibaja/fRtbhaW/table_tennis_3d_live_ping_pong_mod_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ac402fee-74f4-49a6-b5a4-6a03c6a057de.filesusr.com/ugd/b0cd75_55ccc425abcf4aa8a1bb5f5e36815a83.pdf?index=true
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_13341b05a609414ca96cefde24f070a4.pdf?index=true
    • http://pukokudew.epizy.com/how_to_get_into_class_dojo_without_a_code.pdf
    • http://duzebufulumaw.epizy.com/asha_bhosle_songs_mr_jatt.pdf
    • https://161abad2-7de2-49bb-9904-d6e2a620a662.filesusr.com/ugd/2eec94_5b9e6d777837436a99f8a0daa1c3d53e.pdf?index=true
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_5010e392cef64353ab5cf5970e42f271.pdf?index=true
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_5e916b0de03a4c89975e2300ab07373e.pdf?index=true
    • 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_off0000f163.bin
113d14ac3721cb8685dd3d5b8cff415a09817bafc06bf33c6c20e3f00f3d2bb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF163 5384 bytes
font_01_sfnt_off000103d2.bin
b080d63dc57e2260fc7c732e5e06a0f895914c805917ce2eb3b93a12e448eccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103D2 10208 bytes

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