Malicious PDF — malware analysis report

Static analysis result for SHA-256 7638569b52d074b4…

MALICIOUS

PDF

87.2 KB Created: 2021-07-24 06:37:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 01e7ca5628f52eb5fc2c4e15f55a5e0d SHA-1: 8cb88635362f99134a34ae478315e8d21f5152fb SHA-256: 7638569b52d074b46fa6c0070c5a01f5c1d21d44d2400349d035f89d5084d09c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous embedded URLs, many of which point to compromised WordPress sites. These URLs are part of a link farm designed to obscure the final destination, which is likely a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/389rsoiu7fj4gsm4gnf8i36moe/61771635250.pdf In PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b4a06a6c7---xuvubosilikizumemujawu.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/696b5b91b122692713de66aeb74a299d/wijutonixomesuwid.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/tkifos7jmc3e6m90h4l45bv4f4/jijamegomokulajesorapex.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/0tc4inu4lknnc3gqdhsgscujm1/74765423526.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/80160164926.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/t6iqnueacb3vmrl2gott0n3g1e/javifinoxa.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076b652c4ad0---konewolaxowuxonegovuri.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9e928123e---5721198395.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/33722186011.pdfIn PDF document text
    • http://lws-realestate.com/userfiles/files/71692723937.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/73985837343.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/nokarowexed.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/32417182236.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/39102718981.pdfIn PDF document text
    • http://oakgroveschoolheritage.com/clients/b/bc/bc5c94904a1f00f1300372e6f875146f/File/fugegeselulor.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/26663199280.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cc8494966---fipinokakag.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0616240c0---34866836810.pdfIn PDF document text
    • http://ledson.ru/upload_picture/86056429205.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/talal.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/sakagewapegorivesivuju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=grimoire+de+magie+noire+pdfPDF 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_off0000e8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C6 20780 bytes
SHA-256: 5a7f380fd6188f2b3a259758638f10496225cd95598d0216ee388cfc68aa957b
font_01_sfnt_off00011cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13512 10568 bytes
SHA-256: 9441247681f3bcc4416632b4b1a628cbc006a38d7aad846e14019cbc4721643a

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