Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d16256ca17cd187…

MALICIOUS

PDF

88.9 KB Created: 2021-06-28 20:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8d071dd8b47043b98fdaad5e8cd89f36 SHA-1: 3e0fe9f9986857ddcd711c060b64861e07750ef0 SHA-256: 0d16256ca17cd18717b87daadf490d86b6f95d232e480c9af9bcb00dfec81210
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are consistent with attempts to redirect users to malicious content.

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://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/7db2d3237e77ac251b199eecc426266e/doterob.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d906a0228---89566059703.pdf
    • http://bertrandetgastineaudesigners.com/userfiles/file/vuwumupez.pdf
    • https://davaocarrental.com/images/file/kejunujabidetekerexa.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa4908e154---68213011911.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d6943447c46---mefugi.pdf
    • http://meadescafe.com/userfiles/file/xasudobowejolas.pdf
    • https://welltowork.org/wp-content/plugins/super-forms/uploads/php/files/33bf2c978de884e7f6fdf4181a1dbb29/lufewonomosidukos.pdf
    • http://thesecurityguardunion.ca/userfiles/files/48560879817.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804619ad792---zisojujabupiximaguge.pdf
    • http://www.heksan.com.pl/file/zemixuxiz.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c3d01eef7---91219823585.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071656e384e9---numajogelewesobiloxebawu.pdf
    • http://skogsformedling.se/bilder_umeny/File/sujogurofolezo.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b02690419---11566894937.pdf
    • http://cestovni-postylka.eu/userfiles/file/87770282049.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4904baf68b---daxozoxiv.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39fcc99820---77241591087.pdf
    • https://sharadsangam.org/UserFilesTwo/file/warumonezifinamezeremo.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0293d05587---82629480081.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160718d2472e67---7098292241.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b207ece80---kukuwuwexabevanexaronojeb.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74c4299074---wumiradafasobu.pdf
    • https://incoyun.com/calisma2/files/uploads/16801365345.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=operation+of+manual+transmission
    • 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_off0000f92f.bin
16bb2e8f98db914b8f8eaf15d12053dc80687aafc24f9ca96bd26c1e874fcd29		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF92F 10644 bytes
font_01_sfnt_off00011193.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11193 16792 bytes
font_02_sfnt_off000129a5.bin
13130adb5ad2fdfe5e451143604f75d58540827ea69e53dcccd9e57b530f7996		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129A5 17188 bytes

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