Malicious PDF — malware analysis report

Static analysis result for SHA-256 e149ca6202523b6e…

MALICIOUS

PDF

82.5 KB Created: 2021-09-05 20:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: dbe33981cf54781b8f58d1b5e2478bee SHA-1: 641e4fdec01210200c222170f1d19557b69efbc1 SHA-256: e149ca6202523b6e14e3de843e514d1fc85667efd7e398d28a3fd07f09407d8b
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The primary purpose seems to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://garglob.ru/uplcv?utm_term=mtap+reviewer+for+grade+2+elimination+round+pdf PDF link annotation
    • https://mimpishio1.com/contents//files/90203184975.pdfIn PDF document text
    • https://akita-inu.lv/www/files/files/siviposigimebuxed.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ce4d9d61f---soxoj.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/10694371197.pdfIn PDF document text
    • http://talesma.com/E/file/9378224985.pdfIn PDF document text
    • https://unosms.us/userfiles/file/zojiwuvolavajefakofo.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/95938784109.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/c54867156b95aec424c33ea67ad05395/39629751358.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/motiso.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/7198n81a3tblhbdjet6kgkd5o6/sobupuje.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/9f74b86c8bd6ce35bdcbed6d7bac6857/25070228424.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/4ce65e8fd508adf136aa904f32795d26/57187403238.pdfIn PDF document text
    • https://rafaela-motores.com/userfiles/file/ninuwotenobopijobafavok.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/91396133076.pdfIn PDF document text
    • https://mountmoriahcamp.com/media/vepojovojigufimaxulepuk.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/dd5a99248fc472e349bf55b9eb68c4a1/72829147606.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/vinofegafagozusepixifipe.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/89966575212.pdfIn PDF document text
    • https://tempegaring.com/contents/files/luwokavepaziduxevas.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/d9bef020185759bcc41a583e701303cf/lototerejazifenajuli.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/5664653748.pdfIn PDF document text
    • http://africareview.in/userfiles/file/22623835436.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/96484307701.pdfIn PDF document text
    • 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_off0000dd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6A 11040 bytes
SHA-256: b187c6199f9ebe9c72374fc4054129afbce5dbcb12472fcf25718b414f113aba
font_01_sfnt_off0000f6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F2 17264 bytes
SHA-256: 238ff5295a770904f22e38e189f4781e30c855d804a2db51f1ecaa8633cc50ff
font_02_sfnt_off000123d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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