Malicious PDF — malware analysis report

Static analysis result for SHA-256 1695921c19446a0a…

MALICIOUS

PDF

48.3 KB Created: 2021-06-11 13:30:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4f11a77a87282bfaac7f108d67097bdc SHA-1: d3d279ec029577029a60696f8c451674798da0b8 SHA-256: 1695921c19446a0ab065fc93191e257f7c3cb555b8fa46b7159192f1fbd9c557
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, specifically pointing to a URL associated with malicious infrastructure. The document body, though heavily obfuscated, contains references to 'Hacked Roblox Hack' and the malicious URL, reinforcing the lure. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the primary attack vector appears to be directing the user to a malicious website via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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/hacked-roblox-hack-game-hack In PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-legit-no-virus-click-here_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/beat-this-obby-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/cheats-to-get-cars-in-car-crashers-2-roblox_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-free-printables_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-hack-coin-master-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_004_off000053bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53BB 31800 bytes
SHA-256: 3929876c0571145dd742e3fac4a469d3bfc1bb629808a131ec8ad5860c3f4d5b
font_01_sfnt_off00009a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A3C 18356 bytes
SHA-256: 8581072dfcbcb9cdfdb259b6742adf61c333b7d0eff761f338fd5c7fa76d1718

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