Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7dadaa551b7e3c…

MALICIOUS

PDF

47.1 KB Created: 2021-06-08 13:20:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b32fbe169f7886ed4b7605153bc8ba2d SHA-1: 61570098fad9f16ec5b7832b95e44f6437c91c05 SHA-256: fd7dadaa551b7e3c6ecf771e62120b87007820052afd5dfd8d41e5db1145748d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and known malicious infrastructure, disguised as game hacks. The primary lure is a link to 'roblox-god-hack-game-hack', which likely leads to further malicious content or downloads. No scripts were extracted, but the document's structure and embedded links strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.tw/app/431946152/roblox-god-hack-game-hack In PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-no-human-verification-and-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/trouver-la-partie-dun-joueur-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/tiktok-free-save_GM835599320.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-roblox-clothes-codes_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_004_off000054a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54A6 27912 bytes
SHA-256: aebceb2164a7fe95bc262e9c0f43838a117b9e40dff387b07e7679a3709c910d
font_01_sfnt_off00009536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9536 18356 bytes
SHA-256: e38e64f2cfa13abca23a18358f706bd354224cb891419a0c895c373ac23f6e05

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