Malicious PDF — malware analysis report

Static analysis result for SHA-256 89550edaa66e819f…

MALICIOUS

PDF

183.2 KB Created: 2021-06-29 09:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 470d50b5c5282081dcbaf7843ff53cf0 SHA-1: 08f9033e94fee9f6b5c41ad1f85434868f3ced55 SHA-256: 89550edaa66e819fe7c798597288b5f65c50888172a72f9d578f4ddf5d62fbd9
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, but the heuristics indicate a link farm strategy, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93b9d154bb---5736192362.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bac4b936a---ravejawagigimobofe.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/k5apnqake13iad9ngabpo25jvg/guzukadozi.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/b348efbaabfd5e0bac74fd8e7a1249d5/33751154206.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a075beab8cc---rulodasufafumigakovulutux.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16091ab2b45a8a---sanenulupe.pdf
    • http://pnmanagementsolutions.in/uploads/gazube.pdf
    • http://chanakyaaerospacedefence.com/userfiles/file/soxogawolenedugi.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/2df920d4c030b4aed6420152891eb474/44802480407.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/4olja806kp8289903fidj1bu9s/zawizalagikotijofibamabat.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab487ec7113---videxufeputubugovikip.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/k567i1oboko10881ejko5q24je/93090219042.pdf
    • http://aydinservis.com/ckfinder/userfiles/files/47726250991.pdf
    • http://fitnessklub-impuls.pl/uploads/assets/file/xibosojimobijax.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/nmanlk27k213lip95ffkpv080i/mizedadoj.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098407c4e68e---74034860140.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/58939d2b3d857fe017bc1ea735776acf/puboxeguvesujugetosi.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/175e25fbff23dda735ce92ded22d9a8f/3758645715.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c278acff1---60169169845.pdf
    • http://simonide.org/userfiles/file/tesowulameparikomilaname.pdf
    • https://ajwatravel.com/wheelmarine/userfiles/file/2385571448.pdf
    • http://arunimaflavours.com/userfiles/file/jikamerevor.pdf
    • http://tangiahoang.com/skinkorea/Images_upload/files/69432342551.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607637423f318---depod.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=the+river+merchant%27s+wife+theme
    • 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_off0002711d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2711D 16792 bytes
font_01_sfnt_off0002892f.bin
99a4cc896a014fcc59a8c3267ddb2e348951efe5c25f8faa072a1f50bd446bf8
pdf-font-stream PDF embedded font (sfnt) at offset 0x2892F 17508 bytes
font_02_sfnt_off0002b6ab.bin
ccdfd2885cf0bc979d4195eb47912cbc160ab1e34e58f95cc1c40947f96f1e1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x2B6AB 10584 bytes