Malicious PDF — malware analysis report

Static analysis result for SHA-256 a69e84cbbb2ed3c4…

MALICIOUS

PDF

86.4 KB Created: 2021-07-02 22:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c8830b448e2fe26c66c1b47533f89108 SHA-1: af5c7013867e13d00a8ef35c8edc9922bc7343f6 SHA-256: a69e84cbbb2ed3c4002c8dd1648f642ee3a7ae54159cdc1156f3ccb32f0a78b4
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other disposable hosting. The primary purpose appears to be redirecting users to external sites, likely for phishing or malware distribution.

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://pypconsultores.mx/userfiles/file/43711445661.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/qf4jja0tpi2bcabld2no73s460/vuzot.pdf
    • http://dekoblickfang.de/userfiles/file/baramuwerivavodovaf.pdf
    • http://omonetach.pl/foto/ilustracje/file/68997962452.pdf
    • http://giasuminhtam.com/Images_upload/files/bopemejepe.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16086741a02135---puwozoxep.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfb22bfffa---12456087489.pdf
    • https://bouveau-consulting.com/userfiles/file/pidono.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a26c6050cda---borukadudevaraxo.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/ea58b30e88952708391a459793c73c61/25919082094.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608443bec31f5---76460430785.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607b224135c4a---suxofixugodorelup.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/fivuxoxefamigezexuka.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bd21ea773---xidosefetamabagidex.pdf
    • http://geoass.eu/userfiles/files/1614607552.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/l26rsvdj5kcssku5ov0os1qhvt/88122323834.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d228c145fac---83354871491.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b5534a3a9---20379001787.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a286cbcbd59---30817756382.pdf
    • http://www.cddfct.com/up_files/file/68656202156.pdf
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/71320874183.pdf
    • http://dichvugiayphep.biz/upload/ck/files/20743524776.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f342c7df3f---57359019901.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989f685cc5a---31587625975.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=cabs+near+by
    • 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_off0000f296.bin
fe045e5dd5f7f49d0baa74db1b78f3bcf5821715574839aa46ca5e70db60f6c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF296 16732 bytes
font_01_sfnt_off00011e17.bin
2ea1e57c32565edb37107d36e4cf6ca7d14cc4fcac88d80e61102ede8b46ea05
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E17 10032 bytes
font_02_sfnt_off0001348f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1348F 16792 bytes