Malicious PDF — malware analysis report

Static analysis result for SHA-256 57694813ba34500b…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 11:32:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d9f143c9410f76321ba2ccbe23357490 SHA-1: 7382d49ee5742e5bfe9f71308fdf0416bcbef4dd SHA-256: 57694813ba34500b7881bfaa75c2ba5df741660094d6ae36c4d45a7312ae79b7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generators' or 'game hacks' for popular games. The document body and embedded URLs strongly suggest a social engineering lure to trick users into visiting malicious sites, likely to download further malware or engage in scams. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/406889139/daily-free-spin-link-for-coin-master-game-hack In PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/default-fortnite-roblox-tshirt-free_GM431946152.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/how-to-get-fre-robux-2021-novmber_GM431946152.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/free-roblox-exploits-august-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/how-to-find-a-hacker-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-with-no-inspection_GM431946152.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/free-robux-generator-roblox-no-survey-pc-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/free-coins_GM406889139.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/pastebin-2021-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/roblox-girl_GM431946152.pdfIn PDF document text
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/free-coin-coin-master_GM406889139.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_off000032f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F2 22164 bytes
SHA-256: 9472531e1bb6d68b9925cc92e4d1f087d744688a72115e1920873db7a6e7a8a2
font_01_sfnt_off0000642a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642A 18768 bytes
SHA-256: 84e60b0c833095dcfc8bdf529583e07b6d46dae7c19f787dcb3f544e86957181

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