Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a74a227801b54e8…

MALICIOUS

PDF

45.6 KB Created: 2021-05-11 20:14:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7c24c8f4cdf1220a25ab7a478d8b5a7e SHA-1: 1ef87d758e8dfbae286ed1b869a76779a1c0bea8 SHA-256: 4a74a227801b54e80694b9588b6463401bc787022d99277c8cb9a5d24013118c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that lead to known malicious redirectors, disguised as "free generator" or "game hack" lures. The primary link directs users to "get-free-spins-on-coin-master-links-game-hack". While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow designed to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-links-game-hack In PDF document text
    • http://pwpyemen.org/images/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://pwpyemen.org/images/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://pwpyemen.org/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://pwpyemen.org/images/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://pwpyemen.org/images/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/rbxdemon_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/ways-to-get-free-robux-2021_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_off00004742.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4742 24048 bytes
SHA-256: e975fdeb913b059f642e4f4ee664a2b643c44bd5592b691dc73c917a06dc4fe4
font_01_sfnt_off00007e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E31 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off0000904a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x904A 18056 bytes
SHA-256: 4b724ee49242e9c8465e3a985e2896a04a7babff1c2e883c4eb2adcfe8b67358

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