Malicious PDF — malware analysis report

Static analysis result for SHA-256 c509eea4df01f62c…

MALICIOUS

PDF

106.5 KB Created: 2021-03-16 16:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c6ee2a8ad7dd34630e0f0439f4937025 SHA-1: 9b75a270255782c483ba428e151f820a174383f6 SHA-256: c509eea4df01f62cf8a87c6476b6538775187d0c7637bf2e80408c274293dff4
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable hosting, suggests a link farm designed to redirect users to potentially malicious sites. The document body, though heavily obfuscated, contains references to 'Uncharted 4 trophies guide', likely a lure to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://jumiwimov.ru/wix?keyword=uncharted+4+trophies+guide PDF link annotation
    • http://itravelgr.com/wulixuvul08z6f.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/jfhjghJ/59676737942.pdfIn PDF document text
    • http://bbflowers.net/satellite_communications_systems_often_impact_the_product_service_managementiybde.pdfIn PDF document text
    • http://curvepreloved.com/bissell_turboclean_powerbrush_pet3ct60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475380/normal_604b0293746cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469626/normal_5fd3bbb7f0147.pdfIn PDF document text
    • http://osmosiotzs.fun/creating_shared_value_porterq7cwn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421957/normal_6030955562241.pdfIn PDF document text
    • https://cdn.sqhk.co/pategazikiw/eSjgxPa/fifth_edition_character_sheet_pro_apk.pdfIn PDF document text
    • http://itash.space/kendrick_lamar_i_remember_you_was_conflicted_poemzjqbu.pdfIn PDF document text
    • http://shothard.site/78643227440ks4o0.pdfIn PDF document text
    • http://zoompol.xyz/scom_installation_guidesqxt0.pdfIn PDF document text
    • http://pokemonrivals.online/guidelines_for_use_of_anticoagulation_in_pregnancyq69em.pdfIn PDF document text
    • https://cdn.sqhk.co/fasixazijaz/jp1Qji1/kemogudurodojag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca8179d0-b67f-4e14-bb0b-8bcae6251572/jiwurekof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e499d90a-a66d-4d24-9c05-f6a4370acdd8/64971594309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60496331-79b7-4e57-bddc-c23d69553231/puwel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23665743-60ca-4095-b47f-03020c299a37/70914215929.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000164ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164FF 5380 bytes
SHA-256: 7255c50245f6bb760a31c8ae578d61f35271f140005cfb3baccb35173418b23c
font_01_sfnt_off0001774c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1774C 10956 bytes
SHA-256: f8538bcbf3e3d7ca23092c865bfd3aba800de1ec601297be9cb924fc0703ba67

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