Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b16d4b72520dc4a…

MALICIOUS

PDF

33.5 KB Created: 2021-07-06 10:27:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: eddece90adce1f6cc21f92e2844870a2 SHA-1: 8891023c7aa55953bd0683cc68596b96cb2fe932 SHA-256: 9b16d4b72520dc4a9683342a3175745fe694973896a67f56133d510a4699f14c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'generators'. The document body and heuristics indicate a lure to download or access content from these malicious URLs. The primary technique observed is Spearphishing Attachment, as the document itself is the delivery mechanism. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.tw/app/479516143/minecraft-hack-app-game-hack In PDF document text
    • http://lib.icbc-indonesia.org/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-likes-on-tiktok-no-verification_GM835599320.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/is-roblox-free-on-chromebook_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-robux-august-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/cool-aoutfits-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/descarga-hacks-de-robloxs-gratis_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-robux-with-out-human-ver_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/oginject-co_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-roblox-ad-banner_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/cheat-engine-roblox-bypass-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/hack-online-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/www-roblox-hack-free-robux-deutsch_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-gte-free-robux-2021-still-work_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-20210-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC2 22108 bytes
SHA-256: 62d03609868c5c726346db44b708c53ca1e7252c49f394bd54d08daf6e88c6b0
font_01_sfnt_off000060c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C8 18204 bytes
SHA-256: c1185779461864b36b9820a1fc6c8f9e9cb6b26e9ea910c27505907d0185e4b6

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