Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a4a16dce26d2c43…

MALICIOUS

PDF

35.2 KB Created: 2021-07-07 20:54:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 224e97b068382146198d550c6f4ef709 SHA-1: 285cbe82abacf8393f6a04cb63e9888c5cba1dd4 SHA-256: 4a4a16dce26d2c43f09ce6a65ddd070970c86e3d594730eb9c2a03cb0997e2a8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The document body and embedded URLs strongly suggest a social engineering lure to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the nature of the links and the heuristic firings indicate a high likelihood of a phishing or scam attempt.

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/free-robux-com-game-hack In PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/ho9w-to-hack-roblox-with-any-player_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-with-nmap_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/roblox-cheat-engine-saber-war-level-up_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/how-to-get-free-beautiful-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/robux-hack-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/free-roblox-games-that-i-can-play_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/robux-hack-no-survey-no-download-no-password_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/free-robux-finish-obby_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/2021-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/free-script-exucuter-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/free-gift-card-codes-generator-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/vehicle-simulator-money-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/roblox-tix-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/roblox-jojos-bizarre-adventure-script-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/is-there-an-actual-way-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/linoria-hub-roblox-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1blitar.sch.id/__statics/gudangsoal/files/characters-roblox-free_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
font_00_sfnt_off0000313c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313C 23080 bytes
SHA-256: 61e0687438644ea5379fc0849900d736f0e4947f0284344ac64716b9a88d086d
font_01_sfnt_off000064b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B9 18976 bytes
SHA-256: 20782bd0acfe52469dc9f14a315b4aee1c9563688044d1d6d3a516ef71528a8c

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