Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0724beaa9551c4…

MALICIOUS

PDF

90.9 KB Created: 2021-08-09 00:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0be122e789afea0748aa3b4a436aa876 SHA-1: 1c168de6dfc55fb2e4bd07b1b592e17a5db2ff84 SHA-256: 9b0724beaa9551c44d56767baf3643372796aca042874b78e4e2e18bae658a9a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, directing users to multiple compromised WordPress upload sites and other disposable hosting domains. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf09d42f4c---60767607940.pdf In PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/rq5c4r80a4bcud283ffkg7o214/sedoroferus.pdfIn PDF document text
    • http://attlas.center/userfiles/file/53716352754.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/moluda.pdfIn PDF document text
    • http://fygl.net/uploads/file/140430482574.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/42844704500.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/34824090205.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b86d99209d5---noxiropinirewuwetutoki.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/7cla4jhlh1r27cq72mqklh8pvj/zutewize.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/puwevireponojuxukeligozo.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f002650f8a---kojowotewugebuxafisabum.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8ff4506025---sitefewoxawupexase.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/0ac5ed09148438c0fbd17e02c0ad2381/puvisikedapob.pdfIn PDF document text
    • http://maytinhgth.com/userfiles/file/92106028567.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/72267982301.pdfIn PDF document text
    • http://chinalabware.es/d/files/91464294559.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/038ce485050f00f3a2758fbf03bc783e/82928966362.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867656279a0---98200440155.pdfIn PDF document text
    • http://sshs1962.info/clients/3/33/33dcd814b32da85629335a95ab3d0158/File/teladugajov.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/0npc6bj0510tgqnltduvkrdkk8/59289384091.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcb702e53e---jewovoxizonu.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/f260b228b0deacaec8cf072a8923b808/10724797981.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec47d837fa---fedezuza.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cde850ae92c---kafidireja.pdfIn PDF document text
    • https://e-fasteners.eu/media/file/nogowedeb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=why+is+my+sony+tv+blinking+redPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95A 17116 bytes
SHA-256: 963f4ea4178bfad67dd0602820b2690be63c60f5d282992c544a185bec93697f
font_01_sfnt_off0001162e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162E 10936 bytes
SHA-256: 7febd221679ce0bca566fec5abbf3df4e80372aa90d062b213c84ea51dd69c31
font_02_sfnt_off00012f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14737 16344 bytes
SHA-256: 5cd8a120e106fc2d4fc1855603a636a3ce922decfb1b4d98f17a4a5450337c58