Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c7b3979efa7861…

MALICIOUS

PDF

33.3 KB Created: 2021-07-09 02:42:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9d0dfbfb117531c45fdadacfd973074c SHA-1: 998f020bb1b4ad428c7817a799befa408f412f50 SHA-256: 10c7b3979efa78614976e36c91abdd0464ac624e2bd3f214c02e195ab2c6d007
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external resources, many of which are presented as 'game hacks' or 'free generators'. The primary malicious link, http://netcdn.tw/app/479516143/mcpe-free-download-game-hack, is a clear lure to download potentially malicious content. The heuristic firings indicate this PDF is part of a link farm designed to redirect users to exploit sites or download malware, masquerading as cheats for popular games.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • 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://netcdn.tw/app/479516143/mcpe-free-download-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/hack-para-tener-robux-enderobux117_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hack-tool-cheat-hackercon_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/comment-hacker-le-jeu-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-rbxboost_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-a-bizarre-day-cheats_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/counter-blox-roblox-offensive-how-to-get-free-skins_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/quelquun-hacker-mon-compte-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-hair-modles-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/mcpe-com_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/secrect-free-rooms-in-roblox-high-school_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_off00002e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E11 21960 bytes
SHA-256: ca079b3662fd9994a582748ec3d727ae3d3e8f82fe814f58010374273ce3079c
font_01_sfnt_off00005eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBA 18532 bytes
SHA-256: 07bec80ec77a407731f20d425ff760d4af3993c3cbef718c37c298fbcddeff72

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