Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69b5c596ad58bc3…

MALICIOUS

PDF

100.0 KB Created: 2021-08-17 07:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b11ba3b2139cc672fe93e42118d0efc6 SHA-1: a7969420830a09b04b353f93c5ebe1f5edac7766 SHA-256: d69b5c596ad58bc3479a6c378679d9730bd7351c35820cc86b2fe0d886bb6ebc
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to potentially compromised websites and disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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=reglas+del+turista+mundial+el+original PDF link annotation
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/duwojirovuxawuwoxaj.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f5621c87c3d---3895655134.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/c16bb8b57a3fa067abdaa3c5a4a42018/zaxufumazaxuzak.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608663bce2799---78211404369.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e86e20918d---sixibug.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/rewakeselidetem.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/98864664469.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/25584371388.pdfIn PDF document text
    • https://rajatotogroup1.com/contents//files/36969783677.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160db09115f8f4---pafixilelur.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/65c1c7a6f2cff1e45ab124e689fe4be2/zaviludonej.pdfIn PDF document text
    • http://watsonwilliamsreunion.com/clients/82103/File/13234667061.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/c0be68d4c55316c614de1f37ae3fb606/33575517275.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/66688126323.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/6744626881.pdfIn PDF document text
    • http://allasclub.com/campannas/file/30013090597.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dec3ed985---90045642508.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/39947676057.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/3ic0plnmvedqtqch9054q8cml5/nowoxajajobuzakupenaz.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c38881f38e9---51873523102.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/6ad7a7b0b60138a97b6eaf1a10d45cc1/38503152108.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/30564973844.pdfIn PDF document text
    • https://actor-conseil.com/files/file/bikanipufozizumir.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_off00011fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE3 10736 bytes
SHA-256: 3518a95ea7b6be5139c2f94c467618b809870db1c290c74f36b614e6f9f780c4
font_01_sfnt_off00013854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13854 18384 bytes
SHA-256: ad6e9d2a5e7b1b4c24309b3a07cd7ee1f9a18dd94ee4d7fcfa8bc0ef82f10882
font_02_sfnt_off000167be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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