Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d45ccaa5362d434…

MALICIOUS

PDF

59.6 KB Created: 2021-10-03 16:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 81fc52f7b08b9647533aa08393a8822d SHA-1: 22ac87df1070487da9cc06c77dbc90f20ba21084 SHA-256: 0d45ccaa5362d434a8677d9fdfdcd85ce1f0e45a55788ea0cfc5d7dcae31d694
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6632

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://dekobonner.de/userfiles/file/15091426805.pdf In PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161533cbbc18d0---matagevilunewamabotuz.pdfIn PDF document text
    • http://photopuzzle.net/userData/board/file/balenoju.pdfIn PDF document text
    • http://askaudit.ru/price/vokilimef.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/walumedoxikikisadajewor.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/21851899766.pdfIn PDF document text
    • http://borik.customreal.sk/data/files/gasifasavufalobox.pdfIn PDF document text
    • https://gaadalagi.com/contents/files/jitaxasixorakomujuvoto.pdfIn PDF document text
    • https://skywaytravelandholidays.com/ckfinder/userfiles/files/80526413523.pdfIn PDF document text
    • https://houstoncoinclub.org/FCKeditor/file/nixisiposip.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cef3173abf---fowoxuwukokujokab.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/29bf994a6e313f989fcdd6547ed63d1d/47089162975.pdfIn PDF document text
    • http://elai.kz/upload/2021/09files/2109181123230496840flic.pdfIn PDF document text
    • http://gnox.vn/upload/files/41793995511.pdfIn PDF document text
    • http://4yoga.by/pics/files/41670411253.pdfIn PDF document text
    • http://ahdjcm.com/upload/files/27294242041.pdfIn PDF document text
    • http://otestmanager.org/club/data/userfiles/file/20210929171459.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/zakofeguxutezitumoxojoge.pdfIn PDF document text
    • http://tns-china.cn/editor_upload_image/file/wopawubaduwigoparevadapa.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/34077737259.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/tabemodatemed.pdfIn PDF document text
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/19303774426.pdfIn PDF document text
    • https://kaplaitalia.it/userfiles/files/86721358904.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/rexigozajuzopuviz.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/64b59cfa0135cdb6341774bccaf4a004/buzigugimuxitajupozugama.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/25167345237.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=journal+of+mental+health+policy+and+economicsPDF link annotation
    • 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_off0000b5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5D1 16988 bytes
SHA-256: 68af5f6721a1655f019c690d64d5aeb7e38c2b697d2299ec402544f793b5f99a

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