Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6199087d9fe2354…

MALICIOUS

PDF

48.3 KB Created: 2021-05-15 01:04:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 348ae9a897e811cb6e176a0d46155f42 SHA-1: 0690788a82b6ba03b4cce3e7861bd2ce0975cd90 SHA-256: d6199087d9fe2354e919f093b7f11fba269c8983eec8d7a9a2dd6d5fa4e1e035
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8715

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.xyz/app/406889139/master-coin-free-link-game-hack In PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/www-robux-us_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/getrobux-come_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c99.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C99 24272 bytes
SHA-256: bbf2fe854cb6794f3ae87d28796f680ca0dc34b2243d3974d29bbf1047a945e5
font_01_sfnt_off000083b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B7 4028 bytes
SHA-256: a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91
font_02_sfnt_off00009158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9158 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off00009b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B48 17880 bytes
SHA-256: f325bc51a5f33ec2ea6c889aa635c0e4104002a1859551a05fb0fcec2a10294b

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