Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ce835b7403f554…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 14:36:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2058e74096b53c32bbab118e155b5ba8 SHA-1: c33c34ae917d0744623d950cf45e42e29892d5b4 SHA-256: e8ce835b7403f5544be1df0f222380cbd527a992283c04c561b390bf6e772197
160 Risk Score

Malware Insights

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

The PDF document contains multiple links, including one identified as a malicious redirector, that lure users with promises of free game currency or hacks. The primary link, http://netcdn.tw/app/431946152/how-to-get-free-robux-fast-and-easy-game-hack, is associated with known malicious infrastructure. This suggests the document's purpose is to drive traffic to potentially harmful websites.

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/431946152/how-to-get-free-robux-fast-and-easy-game-hack In PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/hack-coin-master-for-iphone_GM406889139.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/roblox-script-executor-free-download_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-roblox-group-payouts_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/robuxian-robux-hack-website_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/original-roblox_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/minecraft-cheats-switch_GM479516143.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_off000030df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DF 22444 bytes
SHA-256: b53b4bd82f1c7a59030d697b22fb01e1886348abc7202eefd78c20a1cbf888e9
font_01_sfnt_off000062cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CC 19340 bytes
SHA-256: e9e0cf1ab6f783e57183aba6e7ab34e8b0edef29a09b47d1de428d0435b690df

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