Malicious PDF — malware analysis report

Static analysis result for SHA-256 f06e28d4d8d92d5e…

MALICIOUS

PDF

78.1 KB Created: 2021-06-25 14:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: de1fee3d01c3a358d092c4c50d807b2a SHA-1: 5d7a5672ff0c3e68ad7f517c1c18856081107a86 SHA-256: f06e28d4d8d92d5e682d0febeec5568dcbe33272a471d96bf13ec9bea9a0f947
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7345

Heuristics 5

  • 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
  • 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://rauvuonsach.net/images/uploads/files/77662109529.pdf In PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b19c7222b9d---kamigalanoxitiwuwok.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///kevulozafununowenev.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a232351d926---61082462273.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/e68sn1udrv7qsv7rscae4jsnl6/55222479938.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/5kgb1nm2iiug1uff1r8p2nodkq/bidagewib.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/85b91a041ae4efb874b9386b0d6582c6/98344434112.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160821ec23d23b---nevazov.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac82e240c25---81074433276.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/vajis.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/lib7jbq2pt8da6edg1cld865p2/22234717780.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/wuwavoxokufinadulapejeki.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/zofejizofunakigapufot.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160958a8e1d232---78183745250.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/eb886729993fce02c357556e9160c4bb/47767446828.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160861f1c438db---17136442280.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/jomupovimaxuluwafibat.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e8f88b9e9---64559644126.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/pegep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=ano+ang+conjunctivitisPDF link annotation
    • 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_off0000e2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000faba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABA 10404 bytes
SHA-256: 368379184a1d5267675af71258d94bd1cb533174733a2d27b51a8c6bc1f63141
font_02_sfnt_off00011277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11277 17536 bytes
SHA-256: e75b3e9574e691dbda41f7bec90ae9cc1bc360c5f86c0f870f27a426359e50f1

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