Malicious PDF — malware analysis report

Static analysis result for SHA-256 311b8e8c46761394…

MALICIOUS

PDF

35.5 KB Created: 2021-07-07 02:45:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c9ef17a7864f5043204ee4edd091c619 SHA-1: c8a44f002cd6b592c6895779aee5cc8136ace273 SHA-256: 311b8e8c467613944c4d99b451c80584d72a7ad35b578d39c833effc66525b18
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'Coin Master' game hacks and free currency. The document body and heuristics confirm the lure is for game-related cheats, aiming to redirect users to malicious sites. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate 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/406889139/coin-master-game-android-free-download-game-hack In PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/coin-master-coins_GM406889139.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/change-roblox-username-free-2021_GM431946152.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/roblox-got-talent-hack_GM431946152.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/www-robux-us_GM431946152.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/free-tiktok-followers-500_GM835599320.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/coin-master-com_GM406889139.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/roblox-hack-ban-2021_GM431946152.pdfIn PDF document text
    • https://www.elearning.mitapasirsakti.sch.id/__statics/gudangsoal/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33F3 22584 bytes
SHA-256: 1be0a33fc633866e7c64457389b65459b5b2854aff6df287e755863e44286d48
font_01_sfnt_off0000667e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x667E 18840 bytes
SHA-256: c25b746967d2d68c7e3e8fa05136ded9a528832b36aea8c8612ecca481efb96d

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