Malicious PDF — malware analysis report

Static analysis result for SHA-256 260333b6ff28466c…

MALICIOUS

PDF

98.1 KB Created: 2021-09-03 20:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e329bedf1a4026896d4006aa73053e51 SHA-1: 956b62e13b0ca296c8592b009d746719b3e492c7 SHA-256: 260333b6ff28466cbfe97a8dcc65be39d2564a3fae654adbecc282239d99e573
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a link farm on compromised CMS upload storage and the 'SE_CALLBACK_LURE' heuristic strongly suggest a phishing or scam attempt. Although no scripts were explicitly extracted, the document's structure and embedded URLs indicate it is designed to lead the user to malicious content or to solicit a callback for fraudulent purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/na9t45blc7rpv1s9e8r0jmpei7/99505400489.pdf In PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/3f15af6e275533c4f7eee9becf8afcef/fosomojufa.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/tapixu.pdfIn PDF document text
    • http://apartamentosalbatros.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8e5e01b708---getamarusazoxebosute.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/rejopetikedimolig.pdfIn PDF document text
    • http://www.agot.pl/upload/file/2798721815.pdfIn PDF document text
    • http://grandfiltr.com/files/file/33847452972.pdfIn PDF document text
    • http://sparkpro.lv/content/file/38627556880.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c44cbba6629---zagoxavisi.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/j9q7frg4ar9rtvjap3d0vimiv1/70368823312.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928dd17169d---62580757244.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/bikodepedoxexirope.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/94689654669.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/jalodefeb.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/xarinifiz.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/aea22cd42ebc4567474fb578e6257010/92354451013.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/82822820991.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0ed02a949---duzex.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/tuzibolus.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/a8d9556b394ef9c87b0bb090c082678d/98796364427.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/74554834510.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/sibifexo.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/84059669794.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=draeger+x-am+2500+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_off000117d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FEA 19380 bytes
SHA-256: ffcb617847ba17d6dae8c5a2f6b6a61ab6df675757364ff465396e64b86f48bf
font_02_sfnt_off000162bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162BC 10588 bytes
SHA-256: 89f0f88974b9143e63f11a1e47cbf245196d4942e1f2012a6c392b27ed9116c3

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