Malicious PDF — malware analysis report

Static analysis result for SHA-256 4514350d663f5f36…

MALICIOUS

PDF

44.2 KB Created: 2021-05-12 11:34:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 306de4f4454afd72f9cc7c3868282bbc SHA-1: c9bc53f0dc07051bd7e394bff4543f74eb0fa0d0 SHA-256: 4514350d663f5f36387507a706677528b812ee107a644120f87a44d6395dd5be
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a known malicious infrastructure, specifically promoting a "free generator" or "game hack" lure. The document body and heuristic firings indicate a clear intent to trick the user into clicking these links, likely leading to the download of a second-stage payload. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/daily-spin-coin-master-free-game-hack In PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/lots-of-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/robux-for-offers_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3tangerang.sch.id/__statics/gudangsoal/files/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004918.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4918 23872 bytes
SHA-256: bdb62a259576fb25ee61e113ee1b46376ffe03de9d6734f3d424471feef9260c
font_01_sfnt_off00007f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F54 3044 bytes
SHA-256: 4aac59c7a0b6ec42ad336d5f2728b142d9fa3aee711829bde3daa284bdeca561
font_02_sfnt_off000089e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E3 18308 bytes
SHA-256: 01600d8872cce32acc5507852554046a99c22a483aa91b7650f376c0d680ad72