Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c5d16e45fc20f5d…

MALICIOUS

PDF

68.4 KB Created: 2021-09-20 02:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d0b7cb440c93a0780910e4a0f6f9f0ed SHA-1: 75281b41689b1e716f2ae524270bcccba2e2adb8 SHA-256: 0c5d16e45fc20f5da20f572a110ba4ca03bc40fffea19069fcd611e8eb8af476
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated maliciousness. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to trick users into downloading files. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically identifies this pattern, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7138

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ketchas.ru/uplcv?utm_term=download+overkill+3+mod+apk PDF link annotation
    • https://alarouba.com/ckfinder/userfiles/files/70535389349.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/paguviwuvezazotulifi.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/xavarozuwoxuzumureta.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142ce9394a5d---96861831333.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/kizemojanepideb.pdfIn PDF document text
    • https://porfic.com/fotos/file/7078083710.pdfIn PDF document text
    • https://shidoremicrosys.com/media/52536349670.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/77a7a2kf6u7vntb8np6uarsv1c/68923031226.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/1938128945.pdfIn PDF document text
    • http://whatcanidoforyou.eu/publish/file/tanowamamokivirekiwoj.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/20219182317533461.pdfIn PDF document text
    • https://gaadalagi.com/contents/files/miforuralopemuw.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/fibunedobapuvedelipodiju.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/fejogikutoxabavinidaxab.pdfIn PDF document text
    • http://yoron.net/up/files/73092318719.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/bezuzipi.pdfIn PDF document text
    • https://datajournonepal.org/files/gekexowamupatumigisalow.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/fixazibijimujenog.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/zasatifiwovoj.pdfIn PDF document text
    • http://keralastatetailorsassociation.com/userfiles/file/bimigupolet.pdfIn PDF document text
    • http://boatmonies.com/uploads/files/45299847934.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/nobelowaxafaropege.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/34338282876.pdfIn PDF document text
    • http://d-a-s.cn/userfiles/file/subiwuzuro.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/kuralidu.pdfIn PDF document text
    • http://xn--lv0az70cxar.tw/uploads/files/202109120643165836.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_off0000e39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39D 10704 bytes
SHA-256: 761076db447570787683a0f101244975afe176c10f227f875502edd4da061deb

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