Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa04035968c00948…

MALICIOUS

PDF

66.6 KB Created: 2021-08-23 11:36:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0832a4844de59dbd4997815de8abd078 SHA-1: e631e78c0b8f7b0cadba5fa2a0ea1e28982a11c1 SHA-256: fa04035968c009484c2f96bf100e222c2827aa2a68a10c35ec219a2d65c100a5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that form a link farm, directing users to various domains, some of which are hosted on compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8990

Heuristics 5

  • 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
  • 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://nomylo.ru/uplcv?utm_term=sorvall+rc+6+centrifuge+manual PDF link annotation
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tilemud.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/sowepotudi.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/viritaziferewikogafukazak.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdc798b096---78355091207.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087c14db113d---58464767077.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/a4fb4b468584c483ebc8a844dde87225/74187548271.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608035daaef39---nutalo.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/pdne08pdnhu1k4eia8q5oeaft3/80515075681.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/eq1qbr4vmb5knaaun7vunsq3fb/47686768038.pdfIn PDF document text
    • http://spec-so.ru/sites/default/files/file/18804118600.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a779e245c---sifevibadimaxavulegojena.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/75481085100.pdfIn PDF document text
    • http://www.minaakshimajumdar.com/fckimages/file/netuzutexovuto.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/ca5554bae9ef416f09eff0e56ecfc7c6/mapidegiwazubeso.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c262249619b---74102486379.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/xakakumok.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c29b0f0c176---rebiwuxiwujofixuxexeme.pdfIn PDF document text
    • https://scalper.ir/data/files/file/93951071934.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202108/file/50890303027.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1611155f444647---83262646103.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/20570769787.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/topum.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/nopnpkmlcd7l2g1q464dctsttk/tavomi.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE923 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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