Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7de0ab2d3a8aec…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 16:18:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f3b5269ddd9dba66b388590feccb6bce SHA-1: ed538690998fbd4e1f944dc8270f40a7a42c1983 SHA-256: 0c7de0ab2d3a8aecc3ad2fbd1605ce260d3a888b101fbf035881acf93572ea4d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links that redirect to malicious infrastructure, specifically targeting users with lures for game hacks and free in-game currency. The ML classifier also flagged this PDF as malicious. The embedded URLs and the nature of the lures suggest a phishing or scamming attempt designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/blox-supply-free-robux-game-hack In PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-pe_GM479516143.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/cm-spins_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/how-to-get-free-robux-without-human-verification-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_004_off000050f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F4 27348 bytes
SHA-256: ef5d3fbdb272ee75e1fda66f716d08c1931800c4649716b0dda929063a3fb292
font_01_sfnt_off00008f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3A 18444 bytes
SHA-256: 0902d75613bc39446e97d9d8a05e59c43b59cebedccbae9a4ab3fb6f34b2e91e

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