Malicious PDF — malware analysis report

Static analysis result for SHA-256 493571a1c63a3689…

MALICIOUS

PDF

74.7 KB Created: 2021-06-29 01:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 14d7b9acd9c1bb54e113ed8a568775c2 SHA-1: 14bfe3a86a93d17ed89ef84f0b335bbb635c0c0a SHA-256: 493571a1c63a3689ecb397bf2327f1ce9d04d360d4e64e6f352ab2fec211777f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/u78dvd8rndb8588p56kdf1o53f/16453816591.pdf In PDF document text
    • http://learningkey.org/userfiles/64911006438.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/009f4926f8c02c4f0acfa56922e060b4/nafewuwesupade.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608577f7b8d72---tifazenu.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/6d268928e1b7aee399025cb2e9de6919/jonitugixilesuda.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/79739112208.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cce613ac75---fapimizinelukunipasisom.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160728305794bf---kekak.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/il24su993dnuj3h2e63kk8quo9/bibepofodasarivako.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/kovaj.pdfIn PDF document text
    • http://stillwaterponies83.com/clients/74660/File/33972750047.pdfIn PDF document text
    • http://55thocscompany.com/clients/62662/File/funedanevavirakipe.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/6b797b95095d4c013f289148960e9a24/joregolowuzakeredate.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/kohdcttv5m7svtk69d8mbh1sk5/zanerod.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cfc9e5bbf---71054503225.pdfIn PDF document text
    • https://impactcleaningserviceskc.com/wp-content/plugins/super-forms/uploads/php/files/c6382ef991d8a7623c873cd4f20dd65d/fovaxupuxovo.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/muwomomaxo.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094932590713---58124595938.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086d89189637---83744039306.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea77bc21d3---sakuzaxobofunulutudujor.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/90e8639e251fa224f2f6e854d50b6c70/doboduf.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a2abcd64a47---giluwovefaxabirana.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/a7f633f67a9ec4c6ea28c9c2611fff43/12317027191.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/23600200626.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/dan7f91dg2b7o806bp9u4lrsdp/kikerixudixuluxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=year+1+tens+and+ones+worksheetsPDF 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_off0000c2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2CF 10420 bytes
SHA-256: c7716804a738e1180e542cfcdd56922fe0d8b07ae866ada82b3c2c2dc3aa5ee1
font_01_sfnt_off0000da71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA71 16548 bytes
SHA-256: 490ec4100f8cddeab77823deab89752e26550dcf332664c142e493b67d2bbf4d
font_02_sfnt_off0001053e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1