Malicious PDF — malware analysis report

Static analysis result for SHA-256 844be4cfa3ab26f6…

MALICIOUS

PDF

35.3 KB Created: 2021-06-26 02:24:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b13ff03e44e6dad0f2ebd1f5d37a4e30 SHA-1: 63dcb220d2c035d5e4eeb95755d3f466931b6bc4 SHA-256: 844be4cfa3ab26f6f8ddef8288b56491ad0000a74f041972fcbc4e7d886f403f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as game hacks and generators. The document body and embedded URLs suggest a lure for free in-game currency or cheats, which is a common tactic for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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/how-to-fly-hack-in-roblox-jailbreak-game-hack In PDF document text
    • https://pemadamapi.net/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/free-robux-obby-april-2021_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • https://pemadamapi.net/images/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • https://pemadamapi.net/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://pemadamapi.net/images/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pemadamapi.net/images/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • https://pemadamapi.net/images/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • https://pemadamapi.net/images/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://pemadamapi.net/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://pemadamapi.net/images/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://pemadamapi.net/images/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/www-robux-free-gift-card-org_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/9-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/free-roblox-account-with-ridable-pets_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/how-to-get-free-robux-in-seconds-2021_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/roblox-hack-script-animations_GM431946152.pdfIn PDF document text
    • https://pemadamapi.net/images/you-want-free-robux_GM431946152.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_off000032a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A2 22228 bytes
SHA-256: 298fe079c6170bd3e38cf85be890ade561e3e2e019fddc5c9ce2decfd706d9e3
font_01_sfnt_off000063df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DF 19448 bytes
SHA-256: cf46ea444ad90596252d1eafac9dcc30eb5d97f73f790aa488a50686541b17b0

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