Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5c8f4bb7524ebd…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 23:16:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e4a2a10d8a2b1acd24a5e44b5734be4c SHA-1: 49a570f20fbd50d033390dfae564bc0beefa409e SHA-256: de5c8f4bb7524ebd80c3d5cdb65ed7603f0397f47fa15e39710508e3bddf412e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and generators to trick users into clicking embedded links. The primary link, http://netcdn.tw/app/406889139/descargar-hack-coin-master-game-hack, redirects to known malicious infrastructure, indicating a likely attempt to download a second-stage payload or phish for credentials. 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.tw/app/406889139/descargar-hack-coin-master-game-hack In PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/cheat-codes-for-roblox-mad-paint-ball_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/optifine-pe_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/pubg-uc-code-redeem_GM1330123889.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-in-2021_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
stream_002_off00003166.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3166 22236 bytes
SHA-256: b6eb85a556f282b616ab69e1470ad1cd954660eef6ffaf35d3b2f0bb0cc4a06f
font_01_sfnt_off000062c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C2 18172 bytes
SHA-256: 11cd317cc6618c87b629164bbdf697a1e1b53e16405413ab0fb2cb112edb56c7

Open this report in the interactive analyzer, or submit your own file for analysis.