Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e010dbd6f565115…

MALICIOUS

PDF

89.9 KB Created: 2021-07-04 12:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9534211fecf5e49772df602c26508804 SHA-1: c11b84feb5e111c86bb2b2d6245e77167172593f SHA-256: 6e010dbd6f565115f33c27c4eae744a7925402663b78112fb65c5443ab7847d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. The document contains a link farm with numerous URLs pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/ncli97muiodvsghkt662esfmi6/38820719348.pdf In PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775d7a655d9---39427208828.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e1fca2a0d---424580314.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/db434f2d319d1e3c303f64d051b120c7/wubavijabusewu.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c61e0de8d47---78941406735.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/e097d0381787986164b8a85dccc8ffd9/78772033400.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de7abbec45---77640570404.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/s1qdrms7p26tua5lbhp37k0tj8/13887488179.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098e54c5ea4d---10120487387.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/somosekasugulifu.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/91172923514.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609875c2335ec---potuzor.pdfIn PDF document text
    • http://katachizu.com/img/news/files/23805841967.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/nidabatuwulat.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7fcd3a9a51---siwokupa.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/nuratogasozonebigamiwufoj.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/wuraxizujobaxu.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e16b90aebda---teribaxumumoluki.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075bf71c1a63---zamozajaliwubakifuwadaba.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081fdf17bdbd---7627112629.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/mapotetivikavabipopojuxaj.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a34ebf080ab---98089733182.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/lejusepunodowureze.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c1ef03919---posiba.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160767ee009fa8---33294123914.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=history+of+the+world+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBE 17064 bytes
SHA-256: 419cdf60aae9372cb6a8998a422bb9c6f269308b25f2a59c4e617336acc32e39
font_01_sfnt_off00012a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5A 10520 bytes
SHA-256: 09857b06ac13e6d0142a0db20305279f6c37521145b7265f35a64a4295cfc4b4
font_02_sfnt_off0001427b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1427B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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