Malicious PDF — malware analysis report

Static analysis result for SHA-256 40ca1dbee0a0bb25…

MALICIOUS

PDF

44.7 KB Created: 2021-05-14 08:14:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c4b5988898d1c2c06bd4770c3d4841bd SHA-1: 7461a767fb6d399abeec8be6f2b05079b32b3d4e SHA-256: 40ca1dbee0a0bb2534d9a34837f8416e1105badb93dadfc674664d886ed28749
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users with promises of game hacks and free in-game currency. One primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. The document body and embedded links suggest a social engineering tactic to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/406889139/get-free-spins-on-coin-master-game-hack In PDF document text
    • http://mostowicz.pl/images/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://mostowicz.pl/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://mostowicz.pl/images/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://mostowicz.pl/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://mostowicz.pl/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://mostowicz.pl/images/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E2 25492 bytes
SHA-256: d387f1fd64f7d7c58bdad2056cf9ca95e9dddf9daa75413960ded8b8d058b721
font_01_sfnt_off000083bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BB 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6D 17884 bytes
SHA-256: 200850e3a78b1b50c9881a74b6d24eace04c65468f288c9b2f31b5952499e453

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