Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea5bc405aaaee36…

MALICIOUS

PDF

73.9 KB Created: 2021-03-22 12:44:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 77ec3afc1d4e33982d5033bb1eaf965e SHA-1: 31507ba0b614b159e27ea0470d0b9c757378e6ed SHA-256: 4ea5bc405aaaee362141edfbc92e8013093ee4b4db59c0e10cca75c024c784ae
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The embedded URLs, such as 'https://dugedepap.ru/123?utm_term=agneepath+full+movie+free++1990', are designed to mimic search results, likely to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dugedepap.ru/123?utm_term=agneepath+full+movie+free++1990 PDF link annotation
    • http://xogavuw.medianewsonline.com/alimentos_ricos_em_vitamina_c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465267/normal_5ffc93ed75a1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373281/normal_602bb8e3ea863.pdfIn PDF document text
    • https://cdn.sqhk.co/vazodowadu/ifidDia/67056798836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485016/normal_5fd630907e02c.pdfIn PDF document text
    • http://joriwolujuf.sportsontheweb.net/lisaz.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/jiLiaha/12492816402.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382779/normal_5fd3ba819e653.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/4iejjf2/bisoxixotilozam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471114/normal_5ff440f44efa1.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/QcYgeOp/18708511493.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/jtiasCI/vuravesijusifabiwaxazedo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_619e4464c46f47ed8107563114798a58.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2267df1f-1bc2-4d94-bf3a-a5f411857f57/tintin_comics_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5452d1a8-0bee-44f7-b5b2-e315e1eef5b0/6240951158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da70f8b1-dcd1-4c41-a83d-b622d2adc2c9/93194677078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3712dd20-4b15-4d3b-b5c8-f1a670dc8169/36565208773.pdfIn PDF document text
    • http://nibizuladode.onlinewebshop.net/mathematical_analysis_free_download.pdfIn PDF document text
    • https://ddb281da-11d2-423e-b83a-408ecf1f607f.filesusr.com/ugd/9db61c_d9a0732967f74b199b8ca52ecba108a2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/42045a09-2687-40e0-bb10-7a3d76280b85/national_social_studies_standards_by_grade_level.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d33e25-a765-437d-8894-ac77175d4c95/how_much_does_it_cost_to_get_a_replacement_id_in_ohio.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/what_are_the_three_genres_of_poetry.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EB 5416 bytes
SHA-256: 87a6445240cf80213f9cb7cfc9252e91ab11be518a11100ebba6f9752cef2848
font_01_sfnt_off0000e53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53E 10816 bytes
SHA-256: d9f526ae2071505dd7f7bf23dc5a33e88f1b396bfd376468a53e15c4488e6e92
font_02_sfnt_off00010a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A32 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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