Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d474a0423d58257…

MALICIOUS

PDF

75.6 KB Created: 2021-04-01 13:35:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6966eb476df9dd496fc3a32a60118b64 SHA-1: 58332ae72ea791fbceafa1dafca964a16353e43d SHA-256: 8d474a0423d582579840fc9e8e750cff267f1f8dde26f42acf63e634605120f4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/award?keyword=peptic+ulcer+disease+treatment+pdf PDF link annotation
    • http://tareworig.mywebcommunity.org/vocabulary_for_ielts_advanced.pdfIn PDF document text
    • http://ginupedarokuxu.getenjoyment.net/definition_of_coronary_artery_disease.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427526/normal_5feb4bfc7ed10.pdfIn PDF document text
    • https://buwuwewofopalun.weebly.com/uploads/1/3/4/0/134097592/1b25f682.pdfIn PDF document text
    • https://puxonuge.weebly.com/uploads/1/3/1/3/131383548/cb59717fb3.pdfIn PDF document text
    • https://noloturajikule.weebly.com/uploads/1/3/4/4/134486045/9657591.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/35226040611.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527237/normal_60027499170af.pdfIn PDF document text
    • http://rejawulomov.mywebcommunity.org/chinua_achebe_civil_peace.pdfIn PDF document text
    • http://zibitivijog.22web.org/lista_de_santos_catolicos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377642/normal_5fd66b6258065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418178/normal_6059781116006.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuwudejirogipux.rf.gd/ravpower_wall_charger_adapter_45w_type-c.pdfIn PDF document text
    • http://wevujonixusenex.rf.gd/senior_accountant_interview_questions_and_answers_free_download.pdfIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_92aada6bcc22495186873f2ac4eb7f98.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c081fb-8e72-4c9a-970f-b80935f92154/what_is_the_purpose_of_the_background_of_the_study.pdfIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_8c26323a4c8b45b6bd1bebb43681a5c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/788f7178-367f-41b8-ab89-f8f17f3c7174/buzexibareruzenikux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/184cb4ef-6758-4c1d-bb96-ec73905e0cea/how_to_crochet_socks_with_pictures.pdfIn PDF document text
    • http://tukorokibenej.epizy.com/mikareriso.pdfIn PDF document text
    • https://medlineplus.gov/pepticulcer.htmlIn 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_off0000ec8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8C 5300 bytes
SHA-256: 9e7b2496645fe6bba4690b26c7542a664a1ff077c59cd01cf8eb59424d32a8af
font_01_sfnt_off0000fe79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE79 10200 bytes
SHA-256: aa7b53ef6b593e45466d3c2a27d5820005845c5331c0d9b5a296dec3fe440742

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