Malicious PDF — malware analysis report

Static analysis result for SHA-256 520568a7ee4c2999…

MALICIOUS

PDF

109.9 KB Created: 2021-06-25 23:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1bec63505101600005e7bd0daf95b6f2 SHA-1: 7249f4918f3731c2d6b4d8a73f22bcbe3193d00c SHA-256: 520568a7ee4c2999066bccab4296ac5563d4a261c88dc53712a688de7f6b1d3d
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is identified as a link farm, likely intended to direct users to malicious websites. The ClamAV detection and ML classifier strongly indicate a phishing or malware distribution purpose. No scripts were extracted, but the structure suggests it's designed to exploit users via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://inwebjor.ru/uplcv?utm_term=cashew+industry+project+report PDF link annotation
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5e8557bfd---87405116813.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/ruromevimunu.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/d0830315c8b8428994a64123485484a4/rewesuxusesa.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/0239c05a64d9c6d90ccee64cfda4be8f/98324332307.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd144e77f4---36497852214.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/1adbdcd8889d4897eb29d6cba37d8330/81107590458.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/6926468124.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160876f75b9024---vamimiwetibifosoka.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f725be32c---22154068256.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/cafc7f54360032b9b4b445f8df942044/71295059796.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098614bc011b---zizudagekibunekexasovuve.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074889e11106---bogudojeluxovizodod.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/36deb13b6f54241bc4a5a07497f0e067/vajek.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/mutabitemigakudefelus.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c74b3ae1a48---11022168777.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/65516dec953c46740c61a6cfc35e41cf/95940918953.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/59956598389.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/ap135e3iened3hqug64erjjajp/45497211061.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/92690381545.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/fd0e329b0064fc3b431ffe8995c1d30a/75471980313.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/jaburirubupinumipef.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcd0b15a08---bexikal.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_off000147bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FD6 11024 bytes
SHA-256: b91c0f7ed840c350f478f4e52a7406a6feddce5a4d8da7b4447a2c91d4b2de9a
font_02_sfnt_off00017982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17982 18280 bytes
SHA-256: 3254a9cf60e04e2a1aa30ec4e930304436bffea527f82633a944a83798cb2dc0

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