Malicious PDF — malware analysis report

Static analysis result for SHA-256 6990cc1b8e792397…

MALICIOUS

PDF

74.7 KB Created: 2021-08-14 13:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 61be805887328f8db0b13e3f99aaa85d SHA-1: 33c162a6f3e87437db372a0964697779eb5e914e SHA-256: 6990cc1b8e7923971553499550f06359f7db25bc56118a0c6fcb08285b83bf70
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, which identified it as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm indicators points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8414

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://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/e8791f834faeb0dc7e83a433d18d9bd3/xofijitot.pdf In PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085251621da8---90870779087.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/9a99080a13bcb63fc59f2d054f6b1269/75130745625.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/94788307554.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/25699244587.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a976bb557e---51370288831.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eab6d0c289---40384360988.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcc37602c45---fozolodamu.pdfIn PDF document text
    • http://stlukesfp.org/ckfinder/userfiles/files/83475973591.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/silox.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/27af44cdffe975cbafea25667f95de0a/nebobiwujupirawe.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/6f0420f42a0c7aeaf694a37066590b89/duride.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0fc156223---70425793037.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/dufojasimufazi.pdfIn PDF document text
    • http://wronba.com/uploads/wysiwyg/file/78938740042.pdfIn PDF document text
    • http://slsnn.ru/content/file/zaferudeferolijazavuj.pdfIn PDF document text
    • http://ecompletecontact.com/ckfinder/userfiles/files/57844850353.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b447b03a6c---96060058808.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/tkm6ld49iibdgl7pi5kaphihbn/nolirewupuf.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/32332497126.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/3e0664d2a94ea5b98c35a54ed0529ebd/kubilogor.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fdc84d23c---lazibarivepewofebimove.pdfIn PDF document text
    • http://studiosiriosrl.it/userfiles/files/kabukoxuwufemixag.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/soxalosixoxubilor.pdfIn PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/5192070282.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=estructura+de+lewis+del+tricloruro+de+fosforoPDF link annotation
    • 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_off0000f665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF665 10536 bytes
SHA-256: 89d702678fb9c14d14d5627b4892e0be8c0daac946cf6fe35960c46baaced7ca