Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c15dc6c26fea2dd…

MALICIOUS

PDF

84.8 KB Created: 2021-02-21 23:53:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5fb9a310ad5e13d01ba74667a6d8820b SHA-1: 0d8386d6242b5f3bed444de4511f0276b2fe66ac SHA-256: 8c15dc6c26fea2dd0baa2a6e2924ee8d7593cabf7092abf9ae5c11c96c7684c7
186 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains references to movie titles and application names, likely serving as a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://maypoin.ru/123?utm_term=the+strange+case+of+dr.jekyll+and+mr.hyde+movie+2003 PDF link annotation
    • http://lavkavkusa.store/8709401222r3llm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_60121985b4b51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455658/normal_601a88767f8b2.pdfIn PDF document text
    • http://arfesopt.com/ariens_st524_snowblower_manuall5568.pdfIn PDF document text
    • https://cdn.sqhk.co/belesobikezi/ijSjigg/58644429057.pdfIn PDF document text
    • https://petivevidimow.weebly.com/uploads/1/3/0/8/130813859/jejow-vimip-pajejamagum-zebajarojated.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/menijipujamogineboxadub1lxvk.pdfIn PDF document text
    • http://predouche.xyz/civil_service_exams_nyc_study_guideapcxy.pdfIn PDF document text
    • http://matroskin.space/application_letter_for_leave_format_sample56f8w.pdfIn PDF document text
    • http://datingsexchat.site/buzazoradebd64.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/aE03gd8/la_redoute_furniture_ireland.pdfIn PDF document text
    • http://shtangye.xyz/home_depot_rustoleum_cabinet_transformations_lightv2rpe.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/hjjXjhY/velijegawojoxazirak.pdfIn PDF document text
    • https://cdn.sqhk.co/tinawegu/hcGq5hY/wiwujizukamavoda.pdfIn PDF document text
    • http://allerop.xyz/breakfast_smoothies_recipessp575.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503197/normal_5ff30ec98e441.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B22 6156 bytes
SHA-256: 29ceb73ccbc271158e7f34f81a4929fea6a43cc212cc65cbcd6c4b174b69ca51
font_01_sfnt_off0001200a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200A 11024 bytes
SHA-256: b2c5200c4677639877f845122823bb3828268db87c840e69a1bcd7aacb783eed

Open this report in the interactive analyzer, or submit your own file for analysis.