Malicious PDF — malware analysis report

Static analysis result for SHA-256 046f8b6c1b6ce24e…

MALICIOUS

PDF

78.9 KB Created: 2021-09-07 19:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee8f6c8323b9d541b1933a2675b7da9b SHA-1: 9bae345b3acff85991aac2174060eb2d427f56de SHA-256: 046f8b6c1b6ce24e8cc7a79e699a6027f5ce90c776fa559ce3412c4dd593dc10
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as a link farm, pointing to numerous URLs hosted on compromised CMS platforms and disposable domains. The embedded URLs are likely intended to lure users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/lepenepikijigubinefewidi.pdf
    • http://ibconsulting.it/userfiles/files/vevudewuxisal.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/e46a5be8377a70fb1e92cdc89b0ea210/xexorib.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608087cb28de6---fodenurobudawotubara.pdf
    • http://yummyschool.com/_UploadFile/Images/file/nujimufa.pdf
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/30831510529.pdf
    • http://dentish.ru/ckfinder/userfiles/files/kelekasesuperowaxod.pdf
    • https://bluetact.com/ckfinder/userfiles/files/penuj.pdf
    • https://mauspro.net/upload/files/93614155959.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c1424cb38---48194393683.pdf
    • https://pui-vital.ro/msg_media/file/5980852761.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/2d51565829157bb516ba441d5883643f/81594968429.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/h3lav818l20ptb0vrbai7qklio/norusekanipofow.pdf
    • http://www.miyadenthai.com/image/upload/File/sepiporikew.pdf
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/7406175274.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bbb0829b7ef28ed9c98e7a45565c7b5f/74260814034.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113762fa84c2---40544219034.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/abfbc084a1f8258d830a1e769cd4f035/95439828691.pdf
    • http://sheeld.org/clients/d/d0/d021426cee8527c21a172be12ef3d645/File/31806304020.pdf
    • https://ratsimae.ee/media/contents/file/99865058891.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c72b496d587---wivufiziwofe.pdf
    • https://nguyenthelong.net/userfiles/files/zobimigo.pdf
    • http://driver-jazda.pl/upload/file/zatuxewagolodatarafijid.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=impresora+pdf+virtual+gratis
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0df.bin
0bde33df928fac59f8f5015d802a3111ec36b0d13c82e4a3031aebfe86c73d50
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DF 17156 bytes
font_01_sfnt_off0000fd6d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6D 16792 bytes
font_02_sfnt_off00011584.bin
2e0ab3e33ebd3a776b71144ca645630bcb894293ab3ecc888b5e3b775c46c2f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11584 10856 bytes