Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c823a268fdc1a6…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 10:42:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3a3f5241306b7debb67c6d27cc709ccb SHA-1: c943ce56e8a1f1990c1d4c9d7889dfa29edb8366 SHA-256: f0c823a268fdc1a6389e377ca9f85fd3ac16b285a074539178a87fec661d6d6d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, masquerading as a generator for game hacks and currency. The document body and heuristics indicate a lure for free Robux or game hacks, which is a common social engineering tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to potentially harmful content.

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/431946152/free-robux-codes-2021-not-used-game-hack In PDF document text
    • https://lib.btkljogja.or.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/multiplayer-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-robux-with-hacking-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-download-roblox-mac_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-bloxburg-hack-script_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/hack-any-roblox-games-using-dex_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/hack-robux-apk_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-card-giver-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-apk-pc_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-cheat-in-fashion-frenzy-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-know-if-im-getting-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/get-free-roblox-game-plays_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7A 22408 bytes
SHA-256: 48b527500406abb75cfe70359a948301af81e127dc27c329a12518db2d74ca30
font_01_sfnt_off00006166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6166 19396 bytes
SHA-256: 25d7bfe460846437b60ba32f00233ff0583bbe4639522c561b722c1edc24abf6

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