Malicious PDF — malware analysis report

Static analysis result for SHA-256 f189d01d8685d502…

MALICIOUS

PDF

105.3 KB Created: 2021-06-29 05:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d63875a0ff91f9326650f4d73b27a206 SHA-1: 4e2dec3124d841cd75396f4fa44247dbc03bd7ae SHA-256: f189d01d8685d5026f9170c6c6886c2fa25fed6eaa81a20621ebb7f4c73c1eff
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting. The embedded URLs suggest an attempt to direct users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/iopi8r06ju4dtbflp4sdu9n0ok/94341066438.pdf
    • http://aaronandanthony.com/userfiles/files/94756102279.pdf
    • https://rybczewice.pl/userfiles/file/29029224195.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/6vudmp4bd44m9u09v9iitqstpp/fejikinedexosovos.pdf
    • http://interel-rus.ru/test/sites/default/files/file/60935185089.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607587fe8f0c8---19598526291.pdf
    • http://jatyn.cn/upfiles/202105/file/1620336364.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d670a86c321---fetesapemup.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/528b4aa69da207ed43548bcc1f08007f/javeti.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a61108550---doxoledamimowupewu.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/v1ghf19hg1i2cfpndhmen85ka0/putezopivokirowadepijub.pdf
    • http://alexanderkanevskyartgallery.com/clientMedia/file/rotavojetuxuterogezesen.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/647e0829a6cdb2a3bbd32c8117d4d432/19402544246.pdf
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/0t9dfd4ra333gj223n7qugof8r/zavozug.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/5fhqdqstml2b380hf446dubc05/96135852352.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747d60d3940---tufarag.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/0ba4ecd9e08ed4443fb5969dfb1043a8/ripufitudu.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/8b8fbd0e07140beb3249e6064a1560d4/79724434764.pdf
    • http://kiemtoanhaiphong.vn/upload/files/naxoriloxotajosa.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/d469ae39651cd7d586d1f5f76fbd1e87/80982221554.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b95bed0dd9d---86811598780.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b94f373cc2---jarezexepururovuxolomisam.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=keith+sweat+get+up+on+it+songs
    • 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_off000135b2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135B2 16792 bytes
font_01_sfnt_off00014dc9.bin
44bab0ca58104aa4f3af8a38442be2bacf52c95f38d2e787f57b3b0f70d24372		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14DC9 10560 bytes
font_02_sfnt_off000165ee.bin
fcf5d32bb6bfcc0ab5582690106b737be7ff4405eaebbef67d40565f7acb6d1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x165EE 18192 bytes

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