Malicious PDF — malware analysis report

Static analysis result for SHA-256 1976e819e325c02f…

MALICIOUS

PDF

34.7 KB Created: 2021-06-26 14:48:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 950ef7463545b144532cdff8763a36eb SHA-1: c9560dd12f2c270e540a6dfae671568b4686c9e8 SHA-256: 1976e819e325c02fc04af2b7262528769273abc8bb041e2a7266f4c7c3cb8e7f
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are designed as SEO link farms for game-related cheats and currency. The primary lure appears to be 'free Robux' or 'Coin Master' hacks, aiming to redirect users to potentially malicious sites. The presence of a 'free generator / game hack' redirector URL strongly suggests a phishing or scamming attempt.

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.co/app/431946152/free-robux-codes-2021-october-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-make-tshirts-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/more-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-roblox-with-edit-this-cookie_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-codes-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-do-i-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-jailbreak-hack-how-to-through-walls-hack-new-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spins-on-coin-master-links-2021_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
stream_002_off00002f20.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F20 22580 bytes
SHA-256: ff6b585ec053f43f4d7802f69ad7cb80b9079001520947eb491d0b19262fa37d
font_01_sfnt_off00006185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6185 19396 bytes
SHA-256: 6998c5103bde1a1467075e69cefa3f4d2cf5d70c1044f2737731bf6f50fc54bc

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