Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb67f773f7cb3255…

MALICIOUS

PDF

45.2 KB Created: 2021-06-13 22:16:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cb82fd8d36ce9df62ae26b6ac49878b1 SHA-1: bba0fbb37631fe3b8995193f03e72ea1699b6f43 SHA-256: cb67f773f7cb32551cdca598074391deeca22eea048a9ab3e35495a47b511acf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a lure for 'free generator / game hack' and links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to game-related terms and the malicious URL. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

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/free-old-roblox-accounts-2021-pastebin-game-hack In PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/hey-google-show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/freer-tiktok_GM835599320.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/roblox-bloxburg-cheats_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-gold-cards-hack_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_003_off00004b6d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B6D 27888 bytes
SHA-256: 311e69951503e35ebd653fc10ea8476a9677f43ff04b22801546e012801388e4
font_01_sfnt_off00008bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB0 19272 bytes
SHA-256: c36348bf32a8a39391c583506c7be17ae9fb2046fc78f8e999e5f1c0c21c506e

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