Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f9046826d10386…

MALICIOUS

PDF

44.8 KB Created: 2021-06-08 18:13:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5d571e1e47918528c4849ab2a989f8d1 SHA-1: f64bb53df14d2fde2da2b52d79a0931d705e3dd8 SHA-256: 96f9046826d10386ffd28d32f26fc6419785275e7fb96d0759f9e448fd8f8b8c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting 'free generator' or 'game hack' lures. The document body, though partially obfuscated, contains references to earning free Robux and includes the primary malicious URL. The presence of these links and the ML classifier's high confidence score indicate a strong likelihood of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/how-do-you-earn-free-robux-on-roblox-game-hack In PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • https://elearning.mtsngresik.online/__statics/gudangsoal/files/robux-page_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_off0000527a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x527A 24724 bytes
SHA-256: ee478badebbee898ef2ad04601069e911d0f659488f92a9ef26f7e8a893566e9
font_01_sfnt_off00008ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADE 18812 bytes
SHA-256: 042be4198cf56df9dd1ab44eb16dc3fcd99568d646b6bf3392607f3bbcdb619a