Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1031c1da45cb860…

MALICIOUS

PDF

76.2 KB Created: 2021-09-23 18:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d150845416173b40faea877e18791fee SHA-1: f89ac3b5feb6791f0ca349ca12fafb5c458c3763 SHA-256: a1031c1da45cb8605c6a0577bff0a00cecb51be1e8f5a2253d6dc256a0f65e81
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF 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 potentially disposable domains, suggests a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://thaifilmind.com/upload/files/95095351518.pdf
    • http://feldbach-tourismus.at/files/77366959224.pdf
    • https://interconformity.ro/images/file/likukixikotinufejow.pdf
    • https://pindimana.in/uploads/file/sezusidapezu.pdf
    • http://burbank.kopanramen.com/uploads/files/11128727660.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16145719eecad2---33268400302.pdf
    • https://kermanrooz.com/img/files/54455804717.pdf
    • https://ritascreation.com/userfiles/file/38359150205.pdf
    • https://cooperspick.com/files/1502637095.pdf
    • http://ahzgbh.news-read.com/upload/files/vixejuzunatuzegimepop.pdf
    • http://chothuexeninhbinh.net/data/dulieu/files/63654942284.pdf
    • http://aucontecnologia.com/userfiles/files/35753003896.pdf
    • http://staresecurity.com/userfiles/file/4808833137.pdf
    • http://pierrevillers.fr/mairie_files/file/rabipokilepinevifuvunefa.pdf
    • http://szjglaw.com/uploadfile/file/2021091923230173499.pdf
    • http://bebsulmare.com/userfiles/files/vamimijatejodabuwuwufa.pdf
    • https://shen-su.eu/gfx/userfiles/files/37282816808.pdf
    • http://elitakhealing.com/ckfinder/userfiles/files/18287377240.pdf
    • http://papianiarch.it/userfiles/files/21862681955.pdf
    • http://hb-hospital.com/file_upload/fck_upfile/file/lufipogofapasalapaw.pdf
    • http://aydinservis.com/ckfinder/userfiles/files/72929711331.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=music+download+for+pc+windows+7
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8fb.bin
4c936f14c50558210555316a4f13d7fcd84a735a9029084ec40916372944b0a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FB 10612 bytes
font_01_sfnt_off0000e16f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE16F 16792 bytes
font_02_sfnt_off0000f981.bin
dcd2cc6128528f4167928f84f6bb1bb525f60a5b709d2f7edbb7a4368f41304e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF981 16136 bytes

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