Malicious PDF — malware analysis report

Static analysis result for SHA-256 674f6971bcbfceca…

MALICIOUS

PDF

80.3 KB Created: 2021-09-12 20:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 31807094ccd9bc0bd59ad3aaf6c8baed SHA-1: 70ba8f43c50ac7a680f2ea1fc1d97e5c00c8b304 SHA-256: 674f6971bcbfceca6ac4cdc87b539713e04f53618d34cf972ae0b9c9e8d8a95b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and embedded URLs further supports the conclusion that this PDF is intended to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7217

Heuristics 5

  • 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
  • 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://medvor.ru/uplcv?utm_term=programma+per+scaricare+video+con+android PDF link annotation
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8d83f2e63---30160871224.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/93380062036.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/37259110053.pdfIn PDF document text
    • http://potentialdesign.cn/userfiles/file/1630686804.pdfIn PDF document text
    • https://matteagianotti.ch/userfiles/files/pikupatapabaferen.pdfIn PDF document text
    • https://airin.lv/images/userfiles/file/lapoku.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16136f2ce45ded---nawelapopadejowofazos.pdfIn PDF document text
    • http://lifebeachvilla.com/uploads/image/files/zetanodoloz.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/1cf881e6157e825ed3d4d55b15470ba5/40500544684.pdfIn PDF document text
    • http://pinxedien.net/upload/files/bimitokulapofuzurizofatun.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a01a944765---pugaziw.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/gaxupotomepufegu.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/84884422721.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/79838895846.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/15496377831.pdfIn PDF document text
    • http://kajo-frings.de/userfiles/file/saruzorutubisugu.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/bo918s0e2cn7cftcfft24jsnqc/95285251447.pdfIn PDF document text
    • http://nhagiatxanh.com/public/default/ckeditor/files/demivabozimajisadonuwap.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/9g3cv9m4lfp37uludchmr952q0/42548829116.pdfIn PDF document text
    • https://nepalihemp.com/ckfinder/userfiles/files/85920190350.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/davefuzukebupijatukati.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/munegonivumidus.pdfIn PDF document text
    • http://honghuibio.com/d/files/71593689983.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/divedesusatakim.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/33642aaabd188461678d6dc3fbcc9296/88664255392.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE913 10780 bytes
SHA-256: 6f2a92aaf1139e944983a20ade74ca3752223525b3709435bb826ad08cc399a6
font_01_sfnt_off000101b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B2 17716 bytes
SHA-256: 8190b16633b2feb680ac59804a57104dce54334bed97bf83fd04c624d5fd642c