Malicious PDF — malware analysis report

Static analysis result for SHA-256 45365c7ab30a7bd3…

MALICIOUS

PDF

89.9 KB Created: 2021-08-04 01:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 357a681f46c05866211c3aef28db53dc SHA-1: e0b980afeee1e224f3089177834f57532922b55a SHA-256: 45365c7ab30a7bd39ada2ad4a276dda4ba763f3d7201aafcb595a585eefabbd6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of these links suggests an attempt to redirect users to malicious sites for phishing or malware delivery. No scripts were extracted from this sample, but the overall structure and URL distribution indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://catamma.ru/uplcv?utm_term=wonder+woman+movie+2020+online PDF link annotation
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609058d441289---bizuvibotuwutez.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/74908089075.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/a56c29a84d4baae84b7c4bd6d32c8085/vijolozuluxobemido.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07d8f6a16d---37331983639.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/pusur.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/40096536402.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/3bdd80ee99c295604e8830e4a8ef4781/davadedisevalawilerimoku.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/81922887084.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/e46cf69a0921ff229e4b24961919fac7/52834385753.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/gobafumidon.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/73546557322.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088efd4a1211---nimurositasobarimufi.pdfIn PDF document text
    • http://ghioroiu.ro/sites/default/files/file/21720810053.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16102b2b66b276---tejaxuzofo.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102d34d84aa0---23298537133.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/kgt6o5t5t141f4lq0vrghdv002/marapokupoxofepoben.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/743754c801ab25f7535fdc05005fecf3/pajipijemimexipamekovi.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/92315763904.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/b8e5746501a4f7edac2ed1ab79917bcb/dajizabiriginekobugux.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1de36a410---70331778682.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1750686823---kerepedofebaxinivu.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/tivito.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC56 17584 bytes
SHA-256: 0a54950539b7f305aabecb53d4d9abacca22fadd2fff515887a02a7f72acde1a
font_01_sfnt_off00012a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14283 10532 bytes
SHA-256: 07fb08598c5c8d7ba2642592de6769e5ece219c50d635004a28d945d73eef1ec

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