Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df9fec6eb1d0abd…

MALICIOUS

PDF

68.8 KB Created: 2021-09-25 08:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 28a5cc7bf2ef09fee91e8ab6d863a181 SHA-1: d1be4eaaa5c669fd62ab631eb123aace64c4a623 SHA-256: 9df9fec6eb1d0abd0adb5fd205deed76eaaecc550f93f68d3b06cf72fac40017
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious sites. The PDF_IMAGE_LURE heuristic indicates it's likely an image-based document designed to trick users into clicking an embedded action, which is a common tactic for spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • 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 68 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
  • 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://get.belonnanotservice.ga/away?/wp-content/plugins/formcraft/file-upload/server/content/files/1614996b423393---36938382629.pdf In PDF document text
    • https://fibra-optica.ro/ckfinder/userfiles/files/gogivize.pdfIn PDF document text
    • http://khocabien.com/uploads/files/dedilisitosu.pdfIn PDF document text
    • https://kiptep.ru/file/zitobudadije.pdfIn PDF document text
    • http://konikanarrowfab.com/ckfinder/userfiles/files/ragufoxugorofelimadapilez.pdfIn PDF document text
    • http://iberryhomemade.com/userfiles/files/jofamosoxamopobinod.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/juxabofiroledaturitaxufad.pdfIn PDF document text
    • http://cuacuonductudong.com/upload/files/73122591661.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/penolirunuxumome.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/87185642454.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/33635400263.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/c33394cc108d13204a425c42085b244a/geditikezuje.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/56399194751.pdfIn PDF document text
    • https://vmgeducationtrust.org/home/vmgedu/public_html/public/userfiles/file/zuvosumewokudoju.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16141c9c7a05c6---juzufojotof.pdfIn PDF document text
    • https://cemb.ca/upload/editor/file/sewibanutebaredikawexa.pdfIn PDF document text
    • http://barefoot.pl/userfiles/file/91790422021.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/sedamizijelufon.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210924165243_vetbs1.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/dezofabanalejukiniwof.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/j7vbf2rjamrvh4shkrm6e8al53/52975489893.pdfIn PDF document text
    • https://doina.md/fckeditorfiles/file/gowazaz.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/49154954894.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=apk+downloader+for+chromebookPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB197 10828 bytes
SHA-256: cb4bbaca4f2a56021690664da0d9b1174d4c0286462587c506d635a62db64478
font_01_sfnt_off0000ca39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24B 14084 bytes
SHA-256: b543ba2f713d468fa0e3063069026eb9b0855a4349b1bfc702ccbd570d65aa8c