Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d20684625dcb2c…

MALICIOUS

PDF

68.3 KB Created: 2021-10-01 15:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5744bb1b7fdc81542a242e48b8ab0514 SHA-1: b300dc03aa616c143f1a2b0e64a3d5a7412f111d SHA-256: d0d20684625dcb2cbb9a841148ac2841b1cca64d105bdf38866081aea000f4a8
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 ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting. The primary goal appears to be redirecting users to external resources, likely to facilitate further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pp-aqua.com/userfiles/files/nofazasusajudurevoloxu.pdf
    • http://podolsk-kondicionery.ru/upload_picture/file/nukoxezametedazobed.pdf
    • http://krcatikyonetimi.com/userfiles/file/93415405871.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/545f973cde643f65ace27b5ea9c6c2a7/89909685354.pdf
    • http://www.bash.cl/media/file/39830794054.pdf
    • https://rafautama.com/uploads/file/fezifat.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb0cfb8c31---bapapebiwogaridajuburixar.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8da0ac0bb---53188462369.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613a678330f96---99875112467.pdf
    • https://zlatartopalovic.rs/files/98306355291.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161397f376069a---47841852764.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f96c24a29e---jisulir.pdf
    • http://champagne-marc-chauvet.com/images/files/vedadusitako.pdf
    • https://nisahanpin.com/calisma2/files/uploads/15571216021.pdf
    • http://kukdae.com/files/fckeditor/file/gavigegekisulutowixamuje.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16152a668c2b08---wedewimalexuduvufezogipox.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=free+iphone+11+pro+max+giveaway+without+human+verification
    • 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_off0000a8c5.bin
6719253d7628700ea94f4373851b587aa30ece9d79b3c53176312e8e44baee74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8C5 16160 bytes
font_01_sfnt_off0000d1ba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BA 16792 bytes
font_02_sfnt_off0000e9d1.bin
c33caee0326b69a02d30dc31033a07e955704b0bf1ec6dcbb1f7d0076bf46671		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D1 11212 bytes

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