Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25cf8548e0ccc2e…

MALICIOUS

PDF

89.0 KB Created: 2021-07-17 11:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 091dbd60973f8e25958cdf41e3f8c901 SHA-1: d6394c8d8c0947014d01ee4a1694511bd2e24064 SHA-256: f25cf8548e0ccc2ee3bce05778ad131b89ed11a493d97a74f3b563559d095c55
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to compromised CMS uploads or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with a link farm designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 http://ecohost.ru/pics/images/file/mafegow.pdf In PDF document text
    • http://derkwoo.com/upload/editor/files/67858382985.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/64a669c5fa14c305cf1da1c9ac6f6660/51495444797.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/ej6hs3p1oo4tkchjklv51f0psh/lizuwekefilatabo.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160803394ac4fe---diviraf.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609106fb44dec---diwebipesogo.pdfIn PDF document text
    • http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/25308097615.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df6ed592399---65950366357.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/sogupoworaseve.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/renulimobiminosa.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/5jag8pbsqfbuv4su8s4hhd8tpq/lexokupadevilebofef.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dde443c2b32---xokabifowizixazaveseg.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/40733157859.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/ed0a93220eaf9ff3b428aade8adbec31/91002939141.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a8413bfbd---xenaxefika.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b25b9b866b7---venozikutefuk.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b43b52966ac---nexezowuburuxowe.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/76773689843.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/zewibedodod.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/duvisevefuxibebuv.pdfIn PDF document text
    • http://juentai.com/userfiles/files/nolisepulenegazizizo.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/fec43d786b9efc091d6b061f09b0f10b/rarunejen.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/76993142808.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c22f7b040---maxifogipasuvirofo.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/bizunatowefiwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=tommy+fleetwood+mastersPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCC 16632 bytes
SHA-256: 680e586a1ee573e661d30ea0f7a97a8805d5b79b2e3d5282e6cd27ea8e1e9edb
font_01_sfnt_off0000f6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF3 18352 bytes
SHA-256: 487fe0ce33f6d5c8786d9a1d26f8ddc5641cab08072c2453ed6cd30049c8c0a1
font_03_sfnt_off00013e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E64 10480 bytes
SHA-256: d191bf15c2d009aa989f2f88521de0c5138a0e89d32d5d79a80046598b1bf544

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