Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c83b245d46929d…

MALICIOUS

PDF

112.4 KB Created: 2021-06-27 00:36:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5233f2a86b155980ca45798afe329c1c SHA-1: b3d728cf3e464f4a7b8e3c2dd20c86bf9a5c1540 SHA-256: 12c83b245d46929d286d187bebd0456f3d507628c97e0f24b88f3c1d0a495a87
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting it functions as a link farm. These links likely lead to phishing pages or further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://40parables.com/wp-content/plugins/super-forms/uploads/php/files/ea13384376339726da6c8d737c0d78a1/zejiv.pdf In PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/e540ede195ccdebe8585703ec116c066/35300480109.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ee8f2d1a0---78653357312.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/98957019283.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/26831550241.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084086298965---wilosijemada.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/8d1104afce2eb52ccfe9e2f0919a5c46/jifotujudukojizulu.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/02c4b3a65ebc69a05170eb3bda2b8e3b/nezakepa.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/13748280135.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/0pm2kd4od3qgt6leppmqcb2ci4/31337286264.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2fd43afff---vumazetetob.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/85165432787.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/62226002290.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6d0799832---ketezenevilefaxib.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a090600fcc3---donosikugubamuvemarole.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed3b671a6a---18152007236.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dafa7a3de9---rigotegonoxidonofuj.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/siwezarilafanojudiwube.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/39e1036d99490d455af9194a996eb9a4/jogowusirixe.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/7d4635867b970cf837c8e55ea883fbcb/79099461346.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca1d04be4a---jepikibezoke.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/98284973090.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=jquery+create+form+and+submitPDF 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

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_off0001525a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1525A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A71 11080 bytes
SHA-256: 63387236371da16609276aed46083e96bb82cfaf0fe80e7bf7c7d83fb14aa3b7
font_02_sfnt_off00018420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18420 18196 bytes
SHA-256: 0ca33d083b12991341fe5a13a0a02d73e5f4a33994e15a4287642413a0f62f9a

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