Malicious PDF — malware analysis report

Static analysis result for SHA-256 27edcfd921273f70…

MALICIOUS

PDF

193.1 KB Created: 2021-06-29 13:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ea6c85537c5924b34324ac5aa0ab51d8 SHA-1: a63bdf78dc90f4d49aa2b2fa78d553505ac5508e SHA-256: 27edcfd921273f70d798fabe004cc6f8d575d269e5986071efc60d5e51f64753
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or link-farming scheme. The primary attack pattern involves luring users to external websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=safety+and+security+plan+template
    • https://colakcivi.com/userfiles/file/73082928143.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abde3b38e93---mosuwebinedidejulukuke.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/76842c54ed23ec3b5cf8387351cae288/tumukurikuvi.pdf
    • http://sacoorhealth.pt/site/upload/file/ritikokefatexuvebu.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/gb93n9c5s3fjuav5lf5i93vqp8/xukizulegegevaku.pdf
    • http://bassbasement.org/userfiles/file/12227969443.pdf
    • http://jinistudy.com/_UploadFile/Images/file/xebukinewovifaror.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160803156d384a---25214857474.pdf
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/31653268427.pdf
    • http://himalayakebab.com/shipinc/userfiles/files/97271406218.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082514c07e3d---98348119074.pdf
    • http://language-coach.pl/uploads/files/muvasixekuledotafeku.pdf
    • https://giverny-bkk.com/upload/files/79571618284.pdf
    • https://hotelexpert.ro/uploads/files/lazusapulejidi.pdf
    • http://zeguvietnam.com/uploads/ckfinder/files/pinafiledag.pdf
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/a01b193076cbd1a469e4b77dc56be179/fumukefaxegovemimaz.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/27b729da628c91eb48177b5aa138cfe1/junolasilarigil.pdf
    • https://noddy.nu/images/file/lojixofarijujifozife.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/0000b7cb65ea5c584ad0307cf0358e6a/13928626644.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/qr1qc8e088apnhn30bahh004q3/suzevevojugapu.pdf
    • http://zulassung4you.de/bilder/file/37229367287.pdf
    • http://hasyo.net/files/file/79545155760.pdf
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d989751e29---59103134300.pdf
    • https://majorsagilekvaros.hu/uploads/file/puxamo.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_off0002924a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2924A 16792 bytes
font_01_sfnt_off0002aa5c.bin
57848879f9dce35c1cde61523ab35b395e58d43b7ad1fbef764b1842998d74ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA5C 19008 bytes
font_02_sfnt_off0002dcd1.bin
9ce13a10a0e5c792114784fa3b5f80a79ba84c9ebe8f8b12638ad56ee40515d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x2DCD1 10952 bytes