Malicious PDF — malware analysis report

Static analysis result for SHA-256 040a69f2d373f110…

MALICIOUS

PDF

86.6 KB Created: 2021-09-07 20:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a9b447cac6809d94ceef0ba18dcca4f SHA-1: 59b085fb3034775f1e48677c75e76a23e950acd3 SHA-256: 040a69f2d373f110782d5c82d2d3cbac96359104c24480c9a8657cffc07d72ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to external sites, some of which are hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://zoncmswebsitebeheer.nl/files/editor/file/73669638083.pdf
    • https://falconshipping-uae.com/userfiles/files/pofote.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088ffde90cf0---guduloxevusatovonoferupu.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/aba26160f2c178e77854970aeb052e12/nevebino.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070c5cfca87c---nuwitenuxokif.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/7055648b763c56bf497473207f230079/95197100799.pdf
    • https://www.casestilistas.es/ckfinder/userfiles/files/xonezetugozokotolelowizaw.pdf
    • https://ebooksweb.net/files/file/9640890694.pdf
    • http://stimatacasa.eu/userfiles/files/suzuloganivoxabamekozovin.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c009fec2900---ladesuvopanekuxirif.pdf
    • https://renetravel.ro/images/files/guwugufebi.pdf
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/9e3de7bc2c1795ec36cf0bee6a4df52d/51821387340.pdf
    • https://liur-krd.ru/userfiles/file/sogutitagovuraperojote.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609472925a58b---16401766524.pdf
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/98107784578.pdf
    • http://n-production.com/upload/fckeditor/file/3996212559.pdf
    • http://citadelcaralarms.com/userfiles/file/25008122006.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/8ed42e386f110b553938bb27c7114c27/26642655376.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/39d7be614dc1f5266b56e4e4a3ffea10/kebuvijurovojajatonusazoj.pdf
    • https://commonwealthsportsawards.com/userfiles/file/regidogekubigigo.pdf
    • https://duvarkagidierzincan.com/userfiles/file/98120899647.pdf
    • http://kayapaliinsaat.net/file/wegebuv.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=%D8%AA%D8%AD%D9%85%D9%8A%D9%84+%D9%83%D8%AA%D8%A8+%D8%B1%D9%88%D8%A7%D9%8A%D8%A7%D8%AA+%D8%B9%D8%A7%D9%84%D9%85%D9%8A%D8%A9+pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off000123e5.bin
7fff724c8fa1ab216566c3ec629b40c7fb4e64dffdbb24cca8c87813bde8a54b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x123E5 21888 bytes
font_00_sfnt_off0000c138.bin
a987202238d187c1526c14cccc34d5a04444fd1a013e3a9daeae63b20e92cad5
pdf-font-stream PDF embedded font (sfnt) at offset 0xC138 18616 bytes
font_01_sfnt_off0000df55.bin
796e4107e271526f9e2054889031ba231c8337df383f47bb2d35bdc4af6a6f00
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF55 18796 bytes
font_02_sfnt_off00011007.bin
ab692011bb810b4091e5b6863c1468cc19624005727076e0e42723678ec61724
pdf-font-stream PDF embedded font (sfnt) at offset 0x11007 9372 bytes