Malicious PDF — malware analysis report

Static analysis result for SHA-256 97306b491c167b28…

MALICIOUS

PDF

62.4 KB Created: 2021-09-19 21:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0aa522904ba7d4ba51276172abc82d13 SHA-1: 0454fa40490fdbd615a6ea488953a05a6f193b5f SHA-256: 97306b491c167b289221ca7e9c4f6cb807250345656aabc27799eec9d5d4d8f8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many pointing to compromised WordPress uploads or disposable domains, indicating a likely phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the nature of the links suggests the PDF is designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5680

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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://krisoc.ru/uplcv?utm_term=order+%26+chaos+2+mod+apk PDF link annotation
    • http://markasib.ru/ckfinder/userfiles/files/kanaxolinegixejigumav.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1614257cabf414---87396369661.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/gubojaterewomewodije.pdfIn PDF document text
    • http://suliaox.com/v15/Upload/file/20219973286691.pdfIn PDF document text
    • https://luathoanghuy.com/uploads/files/fosefofavinom.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/fusewedorevuperujus.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9940180e1---lefedexuw.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/xisimes.pdfIn PDF document text
    • https://inprovitvenezuela.com/ckfinder/userfiles/files/visebatugegupojipanexiw.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/ed1d58fdd44215b0543d2f543cc124d3/zuxabetuvir.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161437d0a87eb4---67445176048.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/204883616.pdfIn PDF document text
    • http://sjanzee.nl/file/91238336353.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/sekatu.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/susibalawowowimarebuxifum.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb0b2ab27f---menerixevejamaze.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/vofebevafepevum.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/dofutafef.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133121e7dc8e---vezapewofamaguxorapi.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613e29c18b831---83717486947.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe68047c9f---kudadaranowafuna.pdfIn PDF document text
    • https://internationallanguagenavigators.com/media/fidejamenekakojaxi.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/dokozuxofemubogaxev.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145bc4a9308f---vefikinobi.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/18578978392.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/xafujafadaravazazebe.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1