Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d5e4359bb2e1ef…

MALICIOUS

PDF

43.4 KB Created: 2021-05-13 22:01:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 364c46c84a34b1af535cb8968417dbff SHA-1: dfcd2503742401c9604c7ce4c6bfa2177d7af5e7 SHA-256: a2d5e4359bb2e1ef5df300d4ba71e631ab7d1ac294c03fbf7a4b623d805cb9ca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting 'free generator / game hack' lures for popular mobile games. The document body, though partially corrupted, contains text related to 'free spins and coins' and a URL that aligns with the heuristic findings. The presence of these links indicates an attempt to redirect users to potentially malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/how-to-get-free-spins-and-coins-in-coin-master-game-hack In PDF document text
    • http://boliviagasenergia.com/images/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://boliviagasenergia.com/images/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/10-robux_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/get-free-spins-on-coin-master-no-human-verification_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_off00004c85.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C85 25288 bytes
SHA-256: aba66ef446ce4f2bf659371c91319dc40de7274bf826e95487a8463d91c8b8b5
font_01_sfnt_off00008770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8770 18224 bytes
SHA-256: 1a177d96c25f70e29c96d18ff08cc0e48255fbbd4539b1ca90a782c549603dc1

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