Malicious PDF — malware analysis report

Static analysis result for SHA-256 8672af6e76dc61a5…

MALICIOUS

PDF

85.4 KB Created: 2021-06-29 06:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a4b730ecddde9c24505bfd2994c0cd84 SHA-1: 2a4c765f53dc7ae0f2394d1df300d1c99177ef82 SHA-256: 8672af6e76dc61a5a4d728512370957d3d928e44ef85956f954377da7dc300fd
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to various websites, some hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/uplcv?utm_term=american+indian+architecture
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/a5c570803622cff3584d63386bcc432a/gavadew.pdf
    • https://kvkumariajnkvv.org/singhania/downloads/file/kegexoxe.pdf
    • https://total-sport.pl/img/upload/files/76533228983.pdf
    • https://bandotrading.it/uploads/file/zinukekirorewoberar.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/9j7ve9lnafoqfi86qi9drkgick/22779187670.pdf
    • http://kondicionery-domodedovo.ru/upload_picture/file/lilopepifi.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/4050163ae09f6335630043971504b948/dabilavaximoravode.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7aaa822b9---zimozerifotovomiwerum.pdf
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/1fjf2dbnjtkssva6of4unkqkrr/nivolojolenik.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db7e1d24a4---wirupetafosifivitesoposu.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b496cace2c6---tipabuzidubabuvatubolapaj.pdf
    • https://stehovani-ostrava.cz/static_pages_files/file/xekusodewevezi.pdf
    • http://ahcxdq.com/uploads/file/280800077114.pdf
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/lagujabel.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/4e297807250fd97f22e14b969f6b32b0/goxukibotojebok.pdf
    • https://planet-for-events.de/userfiles/file/91941417998.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d469d3debe5---wonijabimabeka.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c2e220b71265e69aec4f75c2f0e94546/sixetevof.pdf
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/87647607430.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887ae0303f6---7415158877.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/dc866756f68028c6d5b89045623f7afb/raxokimafipafodifixuno.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbaafed667---bovudubadiniwuxanoju.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862ee284d13---figimipakowipuwa.pdf
    • https://zzhqhi.com/d/files/71907672845.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://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_off0000ec75.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC75 16792 bytes
font_01_sfnt_off0001048c.bin
9b7fee1361ffd629655ff712c7b96b145a8ab0c2387b9ce5ac5d1ccdffa0ce0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1048C 10384 bytes
font_02_sfnt_off00011bc5.bin
f1e0e71643c73e92cb77328808984e844c67ec576674e161ae669e28db414fe6
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC5 17184 bytes