Malicious PDF — malware analysis report

Static analysis result for SHA-256 f44674e8c21282f6…

MALICIOUS

PDF

35.8 KB Created: 2021-07-03 15:55:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6bfe992147d8d52e32900162ad5d5270 SHA-1: 3f39217677ba3d553562bee7b1ac09bdaed280fc SHA-256: f44674e8c21282f6f53ea803e40fbec44291110f47995de2b786cdcf345eb0ce
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, directing users to a known malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting the malicious site. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest an attempt to lead the user to a potentially harmful download or exploit.

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/406889139/coin-master-free-spin-and-coins-links-2021-game-hack In PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-robux-in-five-minutes_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/get-free-shirts-roblox-nbc_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/free-tiktok-and-like_GM835599320.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021-november_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
stream_002_off00003465.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3465 22748 bytes
SHA-256: 9d0d68ee8965f9008df3464bb522af533d933d4b9589dc2ad91679806c762963
font_01_sfnt_off00006737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6737 18920 bytes
SHA-256: 6400190eeb2151d5e1f5614a198f46375c96aba5f11acfeaff13e592fb093653

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