Malicious PDF — malware analysis report

Static analysis result for SHA-256 67504f7e5e03cfe5…

MALICIOUS

PDF

85.5 KB Created: 2021-09-06 02:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 04a256a89e458a33180b82f5fb41c2c2 SHA-1: 7543116b61cd3903a7b740624719cf493d4843fc SHA-256: 67504f7e5e03cfe5a226e31843d44965afd9a94e7bd43a7cbdee568531746f48
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crysiq.ru/uplcv?utm_term=bmw+e36+cabrio+verdeck+einstellen+pdf
    • http://areaengineeringsrl.eu/userfiles/files/pababolivabatixo.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/r6aur0en0a8sticosgr174t5kh/xojinuzomojilovowufa.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160890047647b8---88684224726.pdf
    • https://aduanaldelvalle.com/userfiles/file/rozedudukowirokul.pdf
    • http://terezmisszio.eu/files/file/fimelujuparowinifufel.pdf
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/basim.pdf
    • http://al-bandak.com/userfiles/file/70085549500.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/duv4g0sgu2rgu4hbulc2ba6mr6/jekoremefanajo.pdf
    • https://mihalex.by/files/files/mefiripa.pdf
    • http://hermandadperdon.es/userfiles/file/nonifudagipim.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d3ab826be---72571054435.pdf
    • http://esangsok.com/upfile/files/21734993302.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16082ae026f6e3---bimivisuved.pdf
    • http://mppscstudy.com/admin/usercontent/file/fiwolisibeluworajorob.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160bf8b3129fed---36249945658.pdf
    • http://studiobardinisrl.com/userfiles/files/mumupareg.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/17f048830da34ad551ee05a8a64f0dda/xozefejotesabemagexek.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/730ca6bf42645585862d55c51c9d653a/pevedufot.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/cg368itk1qb178l2m9o38htr5g/tokeguzosomujedajo.pdf
    • http://taiyoaquris.cn/upload/userfiles/files/20210721221503.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/8a265ab9be9ac99b7ee44d006325bf92/tazilif.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608553e02252e---kujeju.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/b7o64hs5hdc3rdbk0piungeos0/94780572284.pdf
    • https://hitourkorea.com/FileData/ckfinder/files/20210603_A166012444C58293.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_off0000e3dc.bin
27f4de9fa04f42bdf8afe8a4a4861604bf086870414c5df28d1ccf2fc469c283
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DC 19032 bytes
font_01_sfnt_off000114ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x114CE 16792 bytes
font_02_sfnt_off00012ce5.bin
3e0862d8fc113fb280676ca5891f7e3ede2af601ec0511dd014be65df8947cc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE5 11556 bytes