Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab3782c4dd2b1a8…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 14:56:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f1de06cc99848372980a9a0224bf4603 SHA-1: ea703977a56d3a9fd4ef2e667c59b2308267766c SHA-256: 8ab3782c4dd2b1a853300c6a91127dfa48a0252db80521f232933fea51e7fe57
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, with a primary URL promising a 'game hack' for Coin Master. The presence of a 'download button' heuristic and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a social engineering tactic to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

Heuristics 4

  • 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 https://netcdn.online/app/406889139/how-do-i-get-free-spins-in-coin-master-game-hack PDF link annotation
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-rules_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/show-me-a-video-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-spins-and-coins-com_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000513a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x513A 24500 bytes
SHA-256: a65d635fe65fee58b81fc3fed1585d05fa815c65da9810d7c9bb637804d46f27
font_01_sfnt_off00008969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8969 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off0000931c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x931C 18216 bytes
SHA-256: b027c2a021bab7014740c7b31d1151edd7292f7703eb7b510e8af7521ebdade3

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