Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e21e6807974fd9…

MALICIOUS

PDF

73.8 KB Created: 2021-09-06 22:34:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0567a1e6d6d3f6cb5ffa4540588c3335 SHA-1: cca974723be8ad652d70fdea9f0437cd063bffee SHA-256: e0e21e6807974fd9a17f345d4e53d588360509b8d1569554d518143fb933e6e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://auxerretv.com/content/public/file/36461582013.pdf
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/7b36a20f125022699cd30bee8bac6f37/41391288704.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16098b1a206730---72071123890.pdf
    • https://alamansyria.com/userfiles/file/wevutawiseneketuxutigiv.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/oh5ct5v3jcn7g863r36se14tk2/38572628961.pdf
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/forezonikirovijij.pdf
    • http://lowndes85.com/clients/d/d3/d39312ffd46aa2fbcc4e4de04d96a17f/File/xaditukufurof.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c00eb73d7cb---figevavinazik.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8b67f1bf6---ladadononevonadamaf.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/04941ea8de7d59126d0a223e25a7e730/20868530990.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743de8958e0---jipowa.pdf
    • https://maria-galland.ru/files/file/24875347808.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610577fa361fa---77389574491.pdf
    • https://alkathirilaw.com/userfiles/files/25292147223.pdf
    • http://bahtiyardishekimi.com/fckfiles/file/72385635581.pdf
    • https://aimtronu.org/userfiles/file/mobevajazidadatos.pdf
    • http://inventory-acepipe.com/images/uploads/files/4994151775.pdf
    • http://stellamaris.cz/userfiles/58830041977.pdf
    • https://habibitours.org/ckfinder/userfiles/files/tiriremuxigibusuzaxonetij.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/b6327171d7428a937f26fce6b76a5070/70772840307.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/7905dfa31cb9850dc2ac36b18a73c010/66663552153.pdf
    • http://btsoft.vn/uploads/files/53733291841.pdf
    • http://elijasprojekts.lv/files/file/dedivamasugos.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=magkasingkahulugan+na+salita+worksheet+grade+2
    • 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_off0000bd5f.bin
314b8295d66bde38f90a119382b4e615cb4b948808df185214e80335d6ff9788
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD5F 16728 bytes
font_01_sfnt_off0000e861.bin
4c3430916210f96753760c2a9d11c62f08bec38cc0dc626bcee55c5b53d8f4a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE861 10916 bytes
font_02_sfnt_off00010185.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10185 16792 bytes