Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3794c0e433f1bf…

MALICIOUS

PDF

35.2 KB Created: 2021-06-30 18:26:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 51ade3291fbef5b327bb199644ef7466 SHA-1: c5700122fc433b8bebb38e32473a3def2dacc073 SHA-256: 7f3794c0e433f1bff4a4725385515a5e002fbad34131d69ba2f0d5873624372a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free game currency and hacks, directing users to a known malicious redirector. The ML classifier also flagged this PDF as malicious. The embedded URL is designed to trick users into visiting a site that likely hosts further malicious content or exploits.

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.co/app/431946152/how-to-get-free-robux-com-game-hack In PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/fnaf-roblox-free-items_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/how-to-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/free-robux-from-watching-ads_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/download-roblox-for-free-seash_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/how-to-get-free-diamonds-in-roblox-royale-high-school_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/roblox-booga-booga-fly-hack-may-26-2021-mojo_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/roblox-free-game-free-to-play_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalkhairiyahkpbahari.sch.id/__statics/gudangsoal/files/get-robux-com_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
font_00_sfnt_off000030f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F6 22792 bytes
SHA-256: a839235d4898138485621040a94a081cde002b932d3a3a4a19b5250b441a9433
font_01_sfnt_off0000641b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641B 19244 bytes
SHA-256: 2a82a6b4e88d45175d2fe2eaf287537d274cffbbed35dd56f8b6e767c09dfc54

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