Malicious PDF — malware analysis report

Static analysis result for SHA-256 74612caa786d8af6…

MALICIOUS

PDF

79.2 KB Created: 2021-06-28 15:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0ccd22e28ec6ede649d5df9ae719cc15 SHA-1: 37a462b74c7a378a97a9648b0de35d3065f6d153 SHA-256: 74612caa786d8af670a689589425e7dcabacadcf9dd9f918d605a746334ddd78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, many of which point to potentially compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, and the document body was unreadable, so the primary indicators are the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://seamcc.com/UserFiles/files/21603618899.pdf In PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/0a3f30840db1d14126d061e17545e999/xugipokidafup.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b38c46420f6---sogefopefe.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/55872262712.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/gipedolakoxu.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c6c77b48d---vujuwifepofu.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/d6777529e7d6ba0b5f38b42e4c05c5e9/bavogirisekukaxazujefo.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/30866591531.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070d4894776c---11149251869.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9dbf0fcc0---ximevuxabajepifomanasire.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/59c1c288f79efa9d7a19ef806a816811/kekudabobutew.pdfIn PDF document text
    • http://belst.by/upload/file/dofodafolupe.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dmatlak91u6q1lrsvdv9bdkc31/56201216379.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/pqq06pfbp57vimmoc4f84l2cf6/50336822653.pdfIn PDF document text
    • http://slhs1958.com/clients/18590/File/jafepipomapavositani.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c142de20e15---jugorukazivilumopuvizos.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/d9d71403a4c424709d3d6b3f04ea30f9/xosifepavusutaxabufo.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607103281c6ed---jiliserewefijudesapidi.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210529182207_d0j97f.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/gulatifilelade.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a17b35d564---kubexelupe.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/96da67c624b07535658544986767dcec/rirunuramifadojoruras.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/744a81860706c4fa042b4edd7c899509/makatepuzeza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=site+of+hercules+first+labor+crosswordPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/6273d25fb0825b0e806f436dd979aea3/20183243490.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA2 17892 bytes
SHA-256: ecb42883b3e3be70c8a111e6dc0354eade5fdcf92680d8e0309ed49368eaa02d
font_01_sfnt_off0000fdd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EF 10872 bytes
SHA-256: e0dee9f55ff10a140d669ba6e9a5ad769ef0671c7f38fbfb3389f0baf756ae43

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