Malicious PDF — malware analysis report

Static analysis result for SHA-256 158b9e78569c0ae4…

MALICIOUS

PDF

34.4 KB Created: 2021-06-26 06:15:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5cdbc59592c5e05d2b1f3940bbfc537a SHA-1: 6c30d952f90b340c020363e9020fe85409b198aa SHA-256: 158b9e78569c0ae48b5d28f2c76e6616b27d41363510b08f0575ffc4e3f1df85
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free in-game currency, specifically mentioning 'Cheat Engine' and 'Roblox'. It contains multiple embedded URLs, with one identified as a malicious redirector infrastructure. The document's primary function appears to be directing users to potentially harmful external sites, likely for further exploitation or malware delivery. No scripts were extracted from this sample.

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.co/app/431946152/cheat-engine-fonctionne-sur-quel-jeu-roblox-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/notoriety-roblox-shadow-raid-secret-cheat_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link-2021-blogger_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/pokemon-go-free-quest_GM1094591345.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-cheat-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/pubg-uc-shop-myanmar_GM1330123889.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/50-free-spins-coin-master_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
font_00_sfnt_off00002d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D9D 22592 bytes
SHA-256: e200dfe2bdfdf296679ce8aec9c1179fe9d8b853e4e4d1ff0223863187cf4618
font_01_sfnt_off00006044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6044 19504 bytes
SHA-256: 29f376e8e7ab0a17b32fea0b14a925b427de1f982c25c594ec0e16c856bb8890

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