Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c06b77509188e9…

MALICIOUS

PDF

56.6 KB Created: 2021-09-28 02:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a46ed01bfacac1ec9a46722b94b52e56 SHA-1: 27fbf3fb3fc494da16ee4c7b2c20c4a69a70b427 SHA-256: 63c06b77509188e92c1797eb0ff1f0bf4c79a0f745816ae9a68fc9dc924790b1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for redirecting users to malicious websites. The 'Image-only document with action trigger' heuristic suggests this PDF is designed as a lure, likely to trick users into clicking a link that leads to a phishing or malware download site. The ClamAV detection further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7262

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
  • 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 56 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.
  • 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://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614fb6f94ade7---fisalujojat.pdf In PDF document text
    • https://giorgiosantinelli.it/file/94564204704.pdfIn PDF document text
    • http://bubb.cn/up_file/file/97071878356.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/moteriragafosegitaje.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/lasorujedewukebi.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/91731517704.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/gapudigakobu.pdfIn PDF document text
    • http://feminella.ro/upload/fck/76113548938.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/88723143209.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/pefaxadi.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/88108774272.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/45574797160.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/wofimifusobowuroxovim.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/70902888992.pdfIn PDF document text
    • http://soyaksiesta3.com/userfiles/file/kufaj.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/84202465299.pdfIn PDF document text
    • http://hwayoung.kr/upfile/files/25324032093.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/sipeju.pdfIn PDF document text
    • http://wingtsunkungfu.ro/imagini_ws/35290375473.pdfIn PDF document text
    • http://medi-sen.com/files/files/35218914139.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/90144811939.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/1182467673.pdfIn PDF document text
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/kosinowam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=god+of+war+chains+of+olympus+apk+obbPDF link annotation
    • https://tes-sys.com/uploads/ckfinder/files/20210916/16317551376765.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_off0000b155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB155 11224 bytes
SHA-256: 576c36f9af35ecfc047bfc43d5cbcf7bd1bc559345dc14bac45fec31444680bf

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