Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b0bacab6dbf7dd…

MALICIOUS

PDF

45.7 KB Created: 2021-06-09 14:40:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 63fe65155b1ff4d3a85c9e951a765be9 SHA-1: 8acd511b82c890e93ab6b33a648a79d5761c5f2a SHA-256: 09b0bacab6dbf7dd64b814e62afd94443f2c5c8422d324602c382ee3a70bc6eb
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency, indicating a phishing or malware distribution attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment. The document body, though heavily obfuscated, contains references to 'Robux Hack' and URLs consistent with the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/robux-hack-facile-game-hack In PDF document text
    • http://suaedy-library.net/repository/how-to-hack-prestons-account-in-roblox_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-white-hat-hacker_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coinmaster_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-free-spins-link-2021-today_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
stream_004_off00005293.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5293 25888 bytes
SHA-256: 6a4f333c8c194fcf291ebe7a0d2f6f28533f7f8447971b4b368975af50480d36
font_01_sfnt_off00008f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F83 18604 bytes
SHA-256: b25e24e65dab0f0c237d374c5670ed0382fc01bb70adb3a665ef2491d9a9af67

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