Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1239596007a996…

MALICIOUS

PDF

62.2 KB Created: 2021-09-07 19:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 61f2e344a02a3fb3c6ac6bcf1e3bf693 SHA-1: 0d0f0ca6b9387bfdb1982f1c3360cd29cf24625f SHA-256: 2c1239596007a9962ccd082041250b70199593b614823e407d681eae42a738b8
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, being image-heavy with a click-outward action and containing numerous links to external, potentially compromised websites. ClamAV detection and ML classification further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and link farm suggest an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6508

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 62 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://wastran.ru/uplcv?utm_term=prayer+of+st+francis+pdf PDF link annotation
    • http://ebslang.net/_UploadFile/Images/file/gizidamusuku.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/5a18c35e6dbc753f7fbe73869df595ea/rovomafi.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/sudawegitu.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/kajumajijakasoworonuvobiw.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afe459263cb---91466977545.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/48385387779.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3b785fc45---povaxenuwilewa.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/86188184389.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60bec6452487c.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/pisodozoxaki.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/sorilegifezevibukuxaf.pdfIn PDF document text
    • http://rioairporttransfer.com/ckfinder/userfiles/files/wumaz.pdfIn PDF document text
    • https://midasspa.com/ckfinder/userfiles/files/26921635765.pdfIn PDF document text
    • https://shinaltd.ru/images/file/22832162157.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/begewubunazumanuj.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/dd8baba1525e48142d6876ca5510ccb5/wuzasaki.pdfIn PDF document text
    • https://flomogroup.com/upload/files/nofexesokadovemomevebe.pdfIn PDF document text
    • http://spakimthi.com/upload/files/99500979583.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/3eee662f7427cb05d40c946807732ab6/vamuvisizinetozob.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/d66a9d47690cbea4b38b2bf870173818/guduriketuxiramufavo.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085aa4a83bff---banikavaxalarujitapuwija.pdfIn PDF document text
    • http://www.moyekolodin.com/files/bejipage.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/guxuledupunatoki.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/57988455920.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/tavekajigiwe.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_off0000b23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB23B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4D 14320 bytes
SHA-256: 90613298225919afd3768f38795165d73b9921ad8d3fea852faec835ad95cf18