Malicious PDF — malware analysis report

Static analysis result for SHA-256 89eb0a0caf0b0329…

MALICIOUS

PDF

86.3 KB Created: 2021-07-21 06:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 764ffe7c824a81786a0285fdea7fe70a SHA-1: c560c4aa01da65b47fba91067980416e17e72392 SHA-256: 89eb0a0caf0b0329d16659c6d4d30e31b03c78a81de29c78abf3f1a30a17f9ef
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites and potentially disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URLs are indicative of a phishing campaign or a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/efbdcbc854c1de08f5db92c684b393ba/temupixiguzulewokisuji.pdf In PDF document text
    • http://gramercy-grand.ru/files/file/925881034.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/29c513d31abe779669960f00b838963b/dubilisunorinutovose.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/zetiwogifutu.pdfIn PDF document text
    • http://aroma--style.net/files/files/ginavaniwodidojenomonas.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/a47903fa7862d8e6b9af7a9951ec3da4/27883070020.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/1439052557.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/99264257874.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/xitajajukirajipexuxifijul.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c38cd466---rawovogovenisap.pdfIn PDF document text
    • http://garderoba.sk/images/_file/84656256233.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/5ca6bd3d5e79be73d4a7cc82346ae626/dupukidawadobodibox.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/jazukidovazavasal.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/ravibijotalefenosez.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/fa7fb8e9eba2f425ed7fa357d75423a5/51963767156.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lepejemejogam.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/93729659217.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/38216085590.pdfIn PDF document text
    • https://qualitymattressfactory.com/admin/userfiles/file/tovepetuvamipufolonif.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/v0etogoqurjsqd5etrn6rv97a5/3826704884.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/3781684673.pdfIn PDF document text
    • http://rafaelokazakov.com/file/53921740277.pdfIn PDF document text
    • http://www.smartlandgroup.com//ckfinder/userfiles/files/75870965306.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/mexirebusidalupejexidalu.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ac96ad37e---jamazuwoduwapug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=one+two+three+baby+you+and+mePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF14 17156 bytes
SHA-256: f8c46f47e057c216849833167bd57c313349ad798004a8d5e4bfa62e3c8e0aa0
font_01_sfnt_off00011b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001334a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334A 10672 bytes
SHA-256: af1c453f916d26e679d32f0cfd52ad83af03670cec3dad1c882547ccc75e84a4