Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0e1cfe14f45f7a…

MALICIOUS

PDF

70.2 KB Created: 2021-05-29 10:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd1e0987b2439c795135b73a1865998f SHA-1: 75cf5238e1d0e217d287542ae45d5da56db7361f SHA-256: 2d0e1cfe14f45f7aa59a4a8a5c0e8887e2c4ed24f3d8c76952ad277a0be3b95c
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to lure users to malicious content. The presence of numerous distinct hosts and links indicates a broad distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e541d561d8---25885392018.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce4bf2df35---64186461795.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e145c1038---12523136008.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcd2132fef---58041977798.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3786a3e2f---83955480329.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/qlfom2l7m1e2oafjvlk7iflnkj/kizikode.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9b618efc7---75749457696.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/om9ib8fnsghlc555cr7cr0onp5/17464641568.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/241057fb59649db8870e96c09aece88d/jamevorogizogewexogedi.pdf
    • http://andlupa.com/userfiles/file/rivisapuselurunudi.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5daf35d5d---kogupefi.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/a25027b14d3fdf0af3511ec24270b68d/jekotuwes.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/0c0b5c5f9b4faa1f0536a0a1e075af4f/zodufetonuduvux.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070e1ff5095a---89759415996.pdf
    • http://agcslohian.com/userfiles/file/wulidasizofuxok.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608467671c5cf---luwamamodowaxu.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/jukn5ir6gb8qf3ogna4q5660i3/tulekepogurusadu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=does+folic+acid+increase+breast+milk
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5da.bin
4685dfe9f7eb09a763b7f92758aba5c744d38b21428bbebe885e02424e70df70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DA 5372 bytes
font_01_sfnt_off0000e80e.bin
63f011825d9bc61a45d8bd5dc21b4cf6d67eb35df749cb1fe6637ad3b0d39ebe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE80E 10604 bytes

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