Malicious PDF — malware analysis report

Static analysis result for SHA-256 d59767897315a7fa…

MALICIOUS

PDF

33.3 KB Created: 2021-07-05 18:19:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 70be378bf058aea6656f0890f0d6a327 SHA-1: 12d27f54bd28c19de17575b7cb45333b353fe55b SHA-256: d59767897315a7facd455aea4f8bd2139d705521ee68078bc04bf793e3bda322
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that are identified as malicious redirectors, specifically promoting game hacks and free currency for popular games. The document body and embedded URLs strongly suggest a phishing or scam attempt to lure users to these sites. No scripts were extracted, but the presence of malicious links and the lure content indicate a high likelihood of a phishing campaign.

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/coin-master-free-spins-daily-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/cardcodepw-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-support_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-lcoins-hack_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/get-your-free-robux-today_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/hack-coin-master-for-iphone_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
font_00_sfnt_off00002ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DDF 22020 bytes
SHA-256: 36c206e88b2e83772957478279bc2a07467d421d300c5ebc4f1fd4dd066b2629
font_01_sfnt_off00005e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7A 18596 bytes
SHA-256: 9b8358e598e07f7d28a63a566b047adfcbccaa59c97f3816d59e3cdcc62e8d14

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