Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a19ae380a751a7c…

MALICIOUS

PDF

68.5 KB Created: 2020-12-27 19:13:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38545bd665efa5bd3a8599d5f9963e4a SHA-1: 4919647d751c945c2f81fd9f908bdb6656d3e2ef SHA-256: 3a19ae380a751a7cb00423db83773f0520b017418215b6050298cdb4ef23afe6
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically identified as a link farm on disposable hosting. The primary malicious URL observed is 'https://traffmen.ru/strik?utm_term=evertech+sandbox+mod+apk+home', which is flagged as a known malicious redirector. The document's structure and embedded links suggest it is designed to lure users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=evertech+sandbox+mod+apk+home
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/21534.pdf
    • https://murezujal.weebly.com/uploads/1/3/5/3/135305344/logopodalu-pozem-nagoxe.pdf
    • https://cdn.sqhk.co/xurazegoba/BAdjjx2/nike_run_club_or_strava.pdf
    • https://minufufigazibur.weebly.com/uploads/1/3/4/5/134528603/1226746.pdf
    • https://betubuko.weebly.com/uploads/1/3/1/3/131379781/751d373a.pdf
    • https://cdn.sqhk.co/pibegufuxova/hIijmBA/42866611988.pdf
    • https://fuwamelewupo.weebly.com/uploads/1/3/4/1/134131589/994983.pdf
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/lemisujife.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/b8965df7-ae0e-47be-a675-0258ea71210b/69322671610.pdf
    • https://uploads.strikinglycdn.com/files/26119701-35c8-4f64-a973-bfa58c69b744/xikunot.pdf
    • https://uploads.strikinglycdn.com/files/c1a29d3d-9e00-4410-aec3-c5a8c8f823de/83061803976.pdf
    • https://uploads.strikinglycdn.com/files/bf2d8a78-5abf-4a16-ba56-8022e3ba6405/nifukenulakezemelaw.pdf
    • https://uploads.strikinglycdn.com/files/5a7d9d39-d9fb-42db-b51c-efc41f49de28/guess_method_calculator_physics.pdf
    • https://uploads.strikinglycdn.com/files/2e230c38-3673-4dbc-9c8b-e76c2bc4e354/40991065153.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c22d.bin
3ca942cb692f4c20204b46343d6a261c232a6703fb482fcf25c2e8894d168f13
pdf-font-stream PDF embedded font (sfnt) at offset 0xC22D 5308 bytes
font_01_sfnt_off0000d405.bin
833378f5023f1264e5ea8446717ea60202c2157b7d9f0781be8bfff21d54f7d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD405 10520 bytes
font_02_sfnt_off0000f73f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xF73F 4324 bytes