Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c2e0a1f728946e…

MALICIOUS

PDF

95.3 KB Created: 2021-07-09 16:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: af0ff228d73fe24fa63c8c8cd874983c SHA-1: aebde63ce7e15dd32c1e7bfdbe1d0309e19d0efe SHA-256: 12c2e0a1f728946e478bd5e76e31497f2685818907881b86394c627c062d3ea9
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary attack pattern observed is the use of a link farm to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://olterus.net/contents//files/bagonibufag.pdf In PDF document text
    • https://t2sc.me/userfiles/87641218629.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c65ac217e70---naxilo.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/rujudazosegamewepizokoke.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/4b128cf80d31b59c0bc91b91fb2383e1/logovikebopuzunuvoki.pdfIn PDF document text
    • https://angkaganjil.com/contents//files/lazemelivijanozalijomul.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/33703087008.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/bidugiwojelosalevanu.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dd05bb02c---tesidomobazozu.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/0207a28e59d6e6773cfc5c679076336d/68478649779.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/161243182093.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/tafatogiso.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844e395609e---85908087843.pdfIn PDF document text
    • http://devison-matras.com/upload/file/zonebivexujiponudibazek.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fb372bd76---12302318171.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/85052850436.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/49052642559.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/lidofutujorojoziwijame.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cb47aae797b---33600470155.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092800f8cf58---58215916041.pdfIn PDF document text
    • https://tjpapigroup3.com/contents//files/73968160817.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/dc1f6beafcba4ead3744ca95134218ec/86955534595.pdfIn PDF document text
    • http://medrea.ru/upload/files/71154436876.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=religious+christmas+trivia+questions+and+answersPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBF 11260 bytes
SHA-256: d2079ae504001708bc9e46c4ff03d2a5c0344d58e28257ceda86fd278593e19f
font_01_sfnt_off00012889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12889 18160 bytes
SHA-256: 0705fe25c339f700d724aeb523706d54e9d505a5aea035c4a8d86203af4b60e1
font_02_sfnt_off00015770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15770 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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