Malicious PDF — malware analysis report

Static analysis result for SHA-256 b784a744ae5aa327…

MALICIOUS

PDF

80.4 KB Created: 2021-03-25 15:56:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0fb21e5b278b33d498ccf0bbd0d74a3 SHA-1: bdd4f120abc0ab4dc776d0fdbf7779b64acd050a SHA-256: b784a744ae5aa327d9884d02a2fb14262405f695fc4ce2b7cf243a872a9a3c87
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/award?keyword=cobb+500+broiler+management+guide+pdf
    • https://cdn.sqhk.co/suxujaba/NAjdXwk/samsung_music_app_playlist_location.pdf
    • https://cdn-cms.f-static.net/uploads/4446394/normal_604472e7d793f.pdf
    • http://zuraleres.mywebcommunity.org/merobijatosi.pdf
    • https://cdn-cms.f-static.net/uploads/4415951/normal_604ad4dd31ad7.pdf
    • http://ronifibofizet.medianewsonline.com/tikopusoparar.pdf
    • http://dowator.22web.org/jisarot.pdf
    • http://teguruta.medianewsonline.com/second_law_of_thermodynamics_practice_problems_answers.pdf
    • http://gopubewigofopa.iblogger.org/35772954778.pdf
    • https://cdn.sqhk.co/bapinero/bigkjjd/3d_glitter_unicorn_live_wallpapers.pdf
    • https://cdn-cms.f-static.net/uploads/4454545/normal_6045ef9b79308.pdf
    • https://cdn.sqhk.co/vulovosovem/jCgj7ji/noovie_arcade_online.pdf
    • https://cdn-cms.f-static.net/uploads/4387922/normal_6040d7784ab88.pdf
    • https://static.s123-cdn-static.com/uploads/4410006/normal_5ffaed11707f9.pdf
    • http://botavubapisod.mywebcommunity.org/jabajo.pdf
    • https://cdn.sqhk.co/tatudawo/wcigjiS/woodturning_magazine_index.pdf
    • http://kimokabif.medianewsonline.com/1784985189.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://56352102-112a-4456-a677-0775450c4ed3.filesusr.com/ugd/ed4e87_68376234a2a7487d835550f65f36edf0.pdf?index=true
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_00d95d2ba7a3434a8ee11d7a8f3d7ecb.pdf?index=true
    • http://kovemipenege.rf.gd/sabepufig.pdf
    • https://d75bbb92-b0e4-4b50-83e6-2443e695523b.filesusr.com/ugd/bc73b9_82485d19be9d4fc485f588ab6ed7a2db.pdf?index=true
    • https://6b551870-9d71-4c88-87ac-30bafd697196.filesusr.com/ugd/b27e13_d3735cd0a2a84ed3b2eed3466d71f80d.pdf?index=true
    • http://najaxobefirag.epizy.com/mamovutidapabejetogonu.pdf
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_2296457d90c54caebbddcc5c72f1fc09.pdf?index=true
    • 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_off0000ee9f.bin
43110c944f0849e0de338091f9f08e39a7ad704daddd5ea822c090c14eed6912		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9F 5496 bytes
font_01_sfnt_off00010133.bin
760bd9ffef18ae73bdfe76794f9ab1e28b66be5695de1495246a519f0dc42bd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10133 10676 bytes
font_02_sfnt_off000125b2.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125B2 4324 bytes

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