Malicious PDF — malware analysis report

Static analysis result for SHA-256 69120d05ce43fd93…

MALICIOUS

PDF

55.2 KB Created: 2021-09-13 22:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f7511582d007d8a54144566c86697597 SHA-1: 00f751cb88806f0c01daa5afe25f530d552247d7 SHA-256: 69120d05ce43fd9361cb79fb6d3a1ac203c4b5f1e007b4c7da933f2b4f6bbaa0
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-heavy content, and embedded clickable links. Heuristics indicate it's designed to look like a legitimate document but functions as a link farm, likely directing users to malicious sites for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6632

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 55 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://archism.ru/uplcv?utm_term=single+codon+amino+acid PDF link annotation
    • https://truonggiangcompany.com/userfiles/file/gisosuzikemotari.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-9-2/20210902053351599142.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/fugubon.pdfIn PDF document text
    • http://gianenricofabro.com/userfiles/files/22982476773.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/16107770830.pdfIn PDF document text
    • https://ibexquimica.com.br/ckfinder/userfiles/files/xepumabakefuzizet.pdfIn PDF document text
    • https://okna-kursk.ru/page_edit/_samples/userfiles/files/xivigufelu.pdfIn PDF document text
    • https://www.premiumtrade.ro/ckfinder/userfiles/files/48093732398.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/69880106180.pdfIn PDF document text
    • http://metamorfozyayincilik.com/userfiles/file/59089373358.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/72839675763.pdfIn PDF document text
    • http://sireny.net/share/files/84702271341.pdfIn PDF document text
    • https://e-casainteligenta.ro/userfiles/file/94908874940.pdfIn PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/semajodapevupixovim.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138865f8f5b2---nisinifeg.pdfIn PDF document text
    • http://livelyway.com/ckfinder/userfiles/files/jepamerazuzu.pdfIn PDF document text
    • https://un7un9b3rl1pa7-99.com/contents/files/84703930141.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/23067439863.pdfIn PDF document text
    • http://yarpb.ru/pic/userfile/fomenukamuzixopebijijeli.pdfIn PDF document text
    • http://kovofilm.cz/userfiles/file/tukopupuninuroragunofuva.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/fajasetedebazote.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/bokafumoxepako.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/10073139389.pdfIn PDF document text
    • http://top-caster.com/userfiles/file/31162187330.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210902184657.pdfIn PDF document text
    • https://takipbizde.com/calisma2/files/uploads/bomuzavibafizekidu.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_off0000b434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB434 13972 bytes
SHA-256: 523a93c7e0d5545bc392c562e216242b3ca2988397ef9a6caf364bd0eb1983fe

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