Malicious PDF — malware analysis report

Static analysis result for SHA-256 5123500aae9b4626…

MALICIOUS

PDF

76.7 KB Created: 2021-09-20 15:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a185f065f47151b5cbc121200a6ce56c SHA-1: f1abecf90d5c32ab36218268616ef36594266f51 SHA-256: 5123500aae9b4626e3ea9cd9260b618933219ed209e4a3a14ef5cb7cfb71d977
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 http://asv-solnice.cz/_files/file/58324357504.pdf In PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/pixufenaxotesorerodu.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146d3a2d79a7---rikuzuxaranigo.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/dikijalu.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/xewuwexibigudubikisabon.pdfIn PDF document text
    • http://noithatlekhanh.com/Images_upload/files/vapatavokivelofapibeseg.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/33806587809.pdfIn PDF document text
    • https://hargagila.com/uploads/image/files/gixariwilexegezaxiwalal.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/43547927413.pdfIn PDF document text
    • https://drproperty.in/userfiles/file/19955852125.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16132e3f408b42---62726665829.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/lezomodut.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/32824341669.pdfIn PDF document text
    • https://losaltos.com/wysiwygfiles/file/lekewamalutifofegukuwonu.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/94466282288.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/g0rluppvncdc84dp61j0qr3feh/10648023305.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/lopumivajekawufuxozofulij.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/jesevogeviw.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/vorivot.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/86889496207.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/98428579630.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/garikuzubagelogoxoxu.pdfIn PDF document text
    • http://chip-chup.hu/upload/file/49270643065.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/5015583592f4a5a006b72ad4e453b9ff/fejojuwetew.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/ximofujivejeledug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=maned+wolf+life+cyclePDF link annotation
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/2380566531.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_off0000c7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AA 10296 bytes
SHA-256: 397cdc4396490875ab189cc8d2a2d44fbdd4fbc5360002a2536654fd6598fd5c
font_01_sfnt_off0000def8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f70a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70A 18048 bytes
SHA-256: 02f258490a2dd7ade1bec9260fff3e30b63c0fb90a2658196bce08f040b5c5c5