Malicious PDF — malware analysis report

Static analysis result for SHA-256 1419973745d5f691…

MALICIOUS

PDF

69.3 KB Created: 2021-09-12 19:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a19e90267d02602d01b7560c85de4eea SHA-1: 2ea544b76083e6300879deae8bc231f544e8757b SHA-256: 1419973745d5f69192f6e55b263f597e199b768901c48760e9ed69964b6d7463
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and the link farm heuristic strongly suggest the document's purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7758

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://smidgel.ru/uplcv?utm_term=mirror+phone+to+desktop PDF link annotation
    • https://jin-ji.com/upload/files/7769660534.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/87511353888.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/veriguze.pdfIn PDF document text
    • https://hk-delight.com/UploadFiles/file/pokomosatikexab.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/genigegugired.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/dowiponizegeduvutoxek.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137fc6474d08---80100028198.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/86688285453.pdfIn PDF document text
    • https://spyboarcams.com/files/81705957771.pdfIn PDF document text
    • https://h1t-urlaurora1-turbo.com/contents/files/bafutebuwidopavufozoji.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/94463067035.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/79144314861.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/29374588025.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/86593761004.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/31754989447.pdfIn PDF document text
    • http://iltorg.ru/upload/file/kejufowogu.pdfIn PDF document text
    • http://travelport.pl/userfiles/file/47933180945.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/gudovuvukag.pdfIn PDF document text
    • https://davaocarrental.com/images/file/fuvujefapejejasu.pdfIn PDF document text
    • http://gamax-moto.cz/data/dokumenty/91841749272.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/nujenisaxo.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/revoposunuwamebaga.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_off0000d936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD936 17468 bytes
SHA-256: a243da3ba32bc6e0103d7263a055d101fe73e754fea06e6407c0abe4f41124ff