Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec6e0afbb20dd57…

MALICIOUS

PDF

33.6 KB Created: 2021-07-06 21:48:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3372a97da59cfe7e084f669487e9d170 SHA-1: 1b9e0e71fb2f670c31e73b70996b4e0a66d720a6 SHA-256: 3ec6e0afbb20dd57989e4191fbba99787d5e0ec96e18dde72b8f5a7ec1183207
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, identified as a 'link farm' by heuristics, suggesting a tactic to manipulate search engine results or redirect users to malicious sites. The primary lure appears to be related to 'game hacks' and 'free generators' for popular games like TikTok, Pokemon Go, and Roblox. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to drive traffic to potentially harmful content.

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/835599320/tiktok-free-like-website-game-hack PDF link annotation
    • http://lib.akpnbahtera.ac.id/repository/hack-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/rexic-roblox-hack-full-lua_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-hack-roblox-acccounts-2021_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/rbx-sites_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/mining-inc-mammoth-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-get-admin-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux-without-verifaction_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-hack-tool-generator_GM406889139.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_off00003020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3020 21840 bytes
SHA-256: ead3f5053f1f665a34e72c135dfdf42aa925a0062c4826faa2a09c9b259e07f7
font_01_sfnt_off00006024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6024 18328 bytes
SHA-256: c27dc07a07f79ec5be5124bcf56a5a4518c0a6200b94b9d4c2f2232401e2f3c2

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