Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e846b534a98a182…

MALICIOUS

PDF

80.8 KB Created: 2021-03-09 05:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00e63600c408e0e9ac22de51d2b227f9 SHA-1: eaa5ae41c04fbc4014f1584cc05982db3f05a3f5 SHA-256: 2e846b534a98a18288a284a41fec72bfc066d8f403ddf94916274fe22b9259b6
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing lure, likely attempting to trick users into downloading further malware or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://seumenha.ru/award?keyword=anger+management+training+module+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367903/normal_601b004fb59fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426407/normal_602f283b1e4f4.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/ghAaugc/gutabinupawapimezalagof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424630/normal_5ff4d789958ff.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/gjbu6UE/dejomuletizubotojasaf.pdfIn PDF document text
    • http://mrt36.ru/bnha_x_wolf_male_reader9ub0q.pdfIn PDF document text
    • http://probkin34.xyz/fedex_trade_networks_careers_memphis_tn3cfdo.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/jiiek5L/clash_of_clans_dragon_slayer_achievement.pdfIn PDF document text
    • https://cdn.sqhk.co/gifalaminika/iarpno3/40418752851.pdfIn PDF document text
    • http://gooddevice-online.com/8307028698rgicb.pdfIn PDF document text
    • https://cdn.sqhk.co/zopezepazedo/iinIg1E/launch_today_cape_canaveral.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477181/normal_6024c669147fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_463351d6591b4270890378799e0af2f3.pdf?index=trueIn PDF document text
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_687f60c696ef4fcba81d018c1d9a270f.pdf?index=trueIn PDF document text
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_74dacb9806f1411b8022c079fbee56a8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcf45237-ceb0-44e8-9616-779b75b53605/jifetafuraj.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/voguzedimepuxiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9370780a-4605-49dc-a08e-a79f14007f8a/what_is_tropical_climate_in_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/721b0d7a-426a-49bc-8355-764fef4ecb95/kidoremuvokawisoliruso.pdfIn PDF document text
    • https://41c240d9-b4af-4f88-8fa4-2a41cce3a287.filesusr.com/ugd/01bc73_662680e826024682a20c593a745c572f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/aldous_huxley_the_doors_of_perception.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d889d9de-1ab3-407c-8b6d-e572626ab906/sefekatofumox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d29f9c69-597d-4311-aa51-169523f3b675/tadajimefizipugux.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/bafg_bayern_formblatt.pdfIn PDF document text
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_ffebba5bfca64dd78e6cb6f5f1ac844f.pdf?index=trueIn 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_off0000ff8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8A 5172 bytes
SHA-256: 4e7d65465f044b8c52635e8bb3e6d324092ab8ad4eca0bbaecfa29efa3339016
font_01_sfnt_off0001110f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110F 10664 bytes
SHA-256: 07399464941fa6c59f443e3f79298752df6a5f2bbd09ccb9b9326100a7452ef8