Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6e1eab781fe9b1…

MALICIOUS

PDF

101.3 KB Created: 2021-08-18 01:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 1ed824aaafc88d305f7631610ecefeeb SHA-1: 4f16b99174e2eefea4c76c18fc6395d372feddf2 SHA-256: 6d6e1eab781fe9b156622a446033c7a0e1da6893b389b87533d45e78df33c9df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution campaign. The presence of 'utm_term' parameters in some URLs indicates an attempt to track user engagement with specific lures. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://irlanc.ru/uplcv?utm_term=nasionalisme+di+burma+pdf PDF link annotation
    • https://mzlpro.com/web/img/podborky/files/52711033844.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021651057566671.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/kotekosigaxisabajizi.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb2ee07fce---62903290314.pdfIn PDF document text
    • https://hefcom-hydraulics.com/ckfinder/userfiles/files/gimerotusowebogamebagugar.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b37d26f187f---98290987672.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16074755dad5e6---papavorewi.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16098667abc023---53663422302.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/33093736787.pdfIn PDF document text
    • http://about-dogs.ru/upload/file/napozet.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb35f23e8---31683626657.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081592d2ab54---xuneguxowulajoxidad.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/meraxumesokozumusawiwo.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/m194v328b3tnkrnsa06iakcj4d/63063471003.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/sowifopogewuxalutesofe.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/webaresovej.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079b5e112ffe---24391758113.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/o5i0vedvboa3v9cb8jf29jb120/14954432688.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c51d26e4fa5---45457260575.pdfIn PDF document text
    • http://porpora.biz/imagenes/imagenes_contenidos///54644864471.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/91215566cbbce846e0ca48f7dd550b5c/57729667757.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/4f53cfc80ff166a3c30703f94950b3aa/nudonerimimisozesere.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_off00012ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000143b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B2 16544 bytes
SHA-256: a673a9e3798b779c1ba499b8d8ae3e14fbdf85c8460c333a702c6d76c2bc7d6b
font_02_sfnt_off00016ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EC6 10776 bytes
SHA-256: 97946a2f64c72e46f4332cdca6bc9c40d8f068551b236ea117f775413f2a53e3

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