Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3764cb086f3311e…

MALICIOUS

PDF

86.2 KB Created: 2021-05-07 00:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bfe3689f35003b6679f4a210bab77ba SHA-1: e0c78116ba6ac7ac57ebb169c7b20b8609a17289 SHA-256: d3764cb086f3311e78d331d1a63d782aff48952c8b55007a525926e0b673b898
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites. The document body, though heavily obfuscated, suggests a lure related to movie subtitles, likely to trick users into visiting malicious sites. ClamAV detection and ML classification strongly indicate malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://philabc.ru/uplcv?utm_term=inglourious+basterds+subtitles+yify
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070021cba527---99057019390.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a65ce7b764---sutam.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/9f14bde91e62c087b2c8911668672f71/45351201945.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e23b32f6f---33910039837.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607045869de66---nokoselojutu.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f50648cfb---64018632001.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/qa1kovcji1fm8f25ijdq9ssi7o/81550620177.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/teqk7kg4f7k063207qqo7tl5fs/fenikaxefefutole.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160874e9c86187---nisil.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076ab13b2a7f---kevubozunutozobuw.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607508b1e8399---mofokipeju.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e7a2eab92---57317516639.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160823c67b7b5d---biwekuvegival.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/78a72bf304ea5eca08ad3773645fa846/dowenowulewis.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/d01ba3dbbd508a27ff588f57a75610e6/lojipilabaritutim.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/122b98b2dee90036d2d8f7df283c091b/74900111785.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/heoja8on2t4kkcr70j9hpamep2/4218976376.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082edfba71af---piposoxemubanadol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4c2.bin
45037d979c18e53cc0c9b4e2db904035a9a64edbb326b3362ccde6b4d1c15afc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C2 2888 bytes
font_01_sfnt_off0000ef0f.bin
56a8ee97e0953f87f0ab12730d66d8bf73d87b84783ec784a3a7310d4d9e65df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0F 5252 bytes
font_02_sfnt_off00010105.bin
4432541d3e6ef48e2c95c89298844ebeaaf9a80b1585bade2f74ed99bb4a7561		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10105 15212 bytes
font_03_sfnt_off000130f5.bin
56fce4f9371fb75543e29091e037d41c59ead4d33561d8ac93de230d79f697c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130F5 17520 bytes

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