Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba6f6c2fe50142e6…

MALICIOUS

PDF

86.9 KB Created: 2021-09-05 21:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8dc063c4c4631eef5ea74820893556b1 SHA-1: a66d25aeae8302326214336471c60bf5987eee1f SHA-256: ba6f6c2fe50142e60204685d522b7e92b2f0fdb21e8766645409a1a3de56066a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting it functions as a link farm to distribute further malicious content. The document body is unreadable, but the heuristics strongly indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1610c3cc08f2dc---gafitov.pdf In PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/32051256196.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d11539736---88421649590.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/fc2d3b753a72c1eaae9205a1d02f6d86/27173608301.pdfIn PDF document text
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/jakipelagefopuwamekiti.pdfIn PDF document text
    • https://solo-enoant.com/content/files/files/kizafajozara.pdfIn PDF document text
    • http://goref.ru/files/file/95201586731.pdfIn PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/89914415651.pdfIn PDF document text
    • http://harlit.com/ckfinder/userfiles/files/20210703_063706.pdfIn PDF document text
    • https://jgranit.pl/userfiles/file/foxarapafigixegiwuzigafit.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2b8c6d221---94390138832.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/81173396179.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/dituxiduno.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56f59e239c---59336734844.pdfPDF link annotation
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/24586158798.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078091b32439---biwevat.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/buzipibeb.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e13e8a577---fexofafidogumixag.pdfIn PDF document text
    • https://ivanamihic.com//files/zuxawufa.pdfIn PDF document text
    • http://www.dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/89633204254.pdfIn PDF document text
    • https://effetre.biz/file/mavolupuduvobi.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607232163e579---31822083290.pdfIn PDF document text
    • http://myslizdrave.com/soubory/kegud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=2007+suzuki+boulevard+m109r+service+manualPDF 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_off0000ebec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEC 18044 bytes
SHA-256: ce913529284e995a8e1c75b9993374cde7f6fd085fd9a2c50063f03f4b663738
font_01_sfnt_off00011b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B42 11304 bytes
SHA-256: 494a4e54271a0e44d34d2099950907b064594537eca22268993e13ecbc0ab028
font_02_sfnt_off000135fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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