Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a48b37e864e38be…

MALICIOUS

PDF

72.5 KB Created: 2021-05-06 23:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e3d8f2bd7de917a4cf37430400c236f SHA-1: 330875e9acc2a97c2733cf5065184b2e94afe578 SHA-256: 3a48b37e864e38bea4fbd7cb7af4cd326a389477c13dabfabd3bc69915f153f2
156 Risk Score

Malware Insights

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

This PDF document contains numerous links to compromised WordPress sites, suggesting it is part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to exploit user trust by masquerading as a Facebook-related image.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/jm570f7d9tt3pnhbn372g11f53/704181385.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db0680b532---dijudovilakujonul.pdf
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/29a2c5691a51474702ae96a2602d3a2b/39711713796.pdf
    • http://www.annaleehuber.com/content_files/file/73506984002.pdf
    • https://lapalettedesarts.fr/gestion/file/woregijuvuputiru.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077e34c719d8---lusugirufalurilifugow.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160901bcd3136f---89265683855.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/4mgs3kq5fd4th6bqjp1vsuf0bh/lelitarogutem.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/4audl97lqm6rdq6k5r4a8pettt/43398566604.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16073bfd92cb48---45831563497.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d6d4b9bc6---botuxemeg.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/gof24b5giq9eaom6imhjkl9pc5/nepuxi.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/768920aaffa55416aa8d5f6f5c744ecb/83724501072.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/10b29a72669f9346f5e910f1c342215f/jolisukijanigegemexi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=facebook+picture+er+online
    • 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_off0000df10.bin
72ee1d472831714dfc73c4847378153b481f3f1f30d38767fe10b10b71ebfc4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF10 4908 bytes
font_01_sfnt_off0000efd4.bin
63e3ad092000716567ab0bf51bb20ad1749a77fdd0090ed709b0dce7338f060d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD4 10952 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.