Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d498d08c4d361a…

MALICIOUS

PDF

102.8 KB Created: 2021-06-30 19:14:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ff4716b3f4c6d4945f0f0280cd9d9ff4 SHA-1: 8a9f29f63d9fe65f89addafd7c7536c2e8f8b874 SHA-256: 97d498d08c4d361afd552ee77f890d322496d6420ef5c69a4789187f7107c34d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and numerous external links suggest it is designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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://infrive.ru/uplcv?utm_term=200+acres+of+land PDF link annotation
    • http://e-cluny.cz/UserFiles/file/96602436049.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086323535de8---veworadinavopotolanitutu.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/u15k99u77r3uk6d33rcr346p69/5794505055.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/bd3a65d61d29c1001444a88d6a5b633d/71749210957.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/46751710467.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/1965177492.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/zawokitejomabe.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/tofijuku.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/62152060423.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/34753608894.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/bejasipiwuba.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/4001pdjdtqd642lkvok2ll4615/dofujebesibijaratosuda.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/gefafetereselubalasudakaz.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/fixovivetoj.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d3b580c12ba---68678430067.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/gepigaxujox.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/5db7a175c7a9b4bc232de9585c6edbdf/66839092490.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/xutikodedasaw.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/82395708095.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cdc4ae76f77---wanela.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/67672649249.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/vc4cpdnh3qm4crvb729c8eufq2/50331992827.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/29995760533.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd2aca477f---xasuseruwizodajob.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/c900fe9b150d7dfa52f9ab9fd9348cb4/fusopunisizazubupurunexa.pdfIn PDF document text
    • 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_off000115c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C2 18704 bytes
SHA-256: ff8dc447e475eebc990db21123512aba4a74c840e24ed5864b927060e59f2c65
font_01_sfnt_off000146fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146FB 16476 bytes
SHA-256: 8cb16b942f89813867a73b74142c7c3ca0fa46f3d2f7cae0a7e46a1d009b2987
font_02_sfnt_off00015da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000175b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175B7 10424 bytes
SHA-256: 9a9d2611a1903549890d8f463ed790d240642f98f490ce37208de25d78de22e6

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