Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf0ac305140d3aa…

MALICIOUS

PDF

91.6 KB Created: 2021-09-06 00:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: beff5a562d3f83a11f0e595ee6795a1f SHA-1: 75978217985c3a5cfc8aec433310d58b067b13b9 SHA-256: 1bf0ac305140d3aa7e77cd6ab6e301042010b62103a7520ce8f3b3153aeddf8f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9672

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://philabc.ru/uplcv?utm_term=uk+railway+map+pdf PDF link annotation
    • https://cissud.com/uploads/ck_editor/files/wusunowap.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/1174872854.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/3852052228.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823f01747d9---dititadamiwosodewejofi.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9a5ba89dc---99323609983.pdfIn PDF document text
    • http://mopi.eu/ckfinder/userfiles/files/monuxewekivazamonupopa.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a12a876ea09---difanifazemusufub.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/suvimojotofilidimopoki.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf16f46f9e---birixujugulokesitilujevo.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096783f4e6a0---84278721943.pdfIn PDF document text
    • http://sb-78.ru/files/file/sizumubatunodujunifemuxe.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/75887243942.pdfIn PDF document text
    • http://gzky.cn/dubeite/ckfinder/userfiles/files/20210823_185451.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d288a1a1d---75798753685.pdfIn PDF document text
    • http://hyderabadibiryanicorner.com/admin/images/file/91449432571.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/66959524022.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/pabuwew.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3e930a75a---zumovumonuwijeve.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/40cb0ace1ba6e077371480d7302e0e43/lupotavu.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098ba618d441---91924537412.pdfIn PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/24066131485.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160878368f2fa8---xafufotirabuvogoterijina.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be80f014afd---dabasizujugarakina.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/7k369a7misq1cv6t065j7me833/xinegikikimapenunoj.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/dezulugurugegarufox.pdfIn PDF document text
    • http://savages.lu/imagesRTE/files/nosazo.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/ce9e624d253e6ed04aa39c538e9db21b/xiwapegizubeximoparizin.pdfIn PDF document text
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10673 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8A 10336 bytes
SHA-256: 3b1caf6ba01af8d38e123829bbdc25d5c943632fbcb40fdb202e83606c1a7c20
font_02_sfnt_off000135d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135D2 18656 bytes
SHA-256: fd65a619c7a4c7a237d95bb0b61e24fcb56398df3eaad28120322465d2234bbd

Open this report in the interactive analyzer, or submit your own file for analysis.