Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6228b6ab5f458cf…

MALICIOUS

PDF

50.0 KB Created: 2021-05-12 19:03:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5ebd4db385536191ebd4edce9a624325 SHA-1: 0a6949f42b7870cd7a13a46e66229121cb82c092 SHA-256: a6228b6ab5f458cf3857570ddd0dac4e8d4a40faaaa7c5330b05965498950f39
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and cheats, a common lure for malware distribution. The heuristic firings confirm the presence of malicious redirector links and a lure for free generators, indicating a phishing or malware delivery attempt. No scripts were extracted, but the document's structure and embedded links strongly suggest it is designed to trick users into downloading potentially malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9349

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/coin-master-hack-version-2021-free-download-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/mc-hacks_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/wurst-18-9_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-more-robux-for-free_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_off00004e36.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E36 31968 bytes
SHA-256: b05cdd011668821291ab7bb19d6afcd78f8f7b280a8d57c50ee1a456f32712c5
font_01_sfnt_off000093de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93DE 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00009f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F08 18996 bytes
SHA-256: 92d9309ab276bc9aab9745226f7a970795db6d0c86763d97e38cf379742c13e0

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