Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc784e0b0f15bcc0…

MALICIOUS

PDF

36.7 KB Created: 2021-06-28 10:10:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f7a3e6b80ef9a05892ce4f0e0d2f529d SHA-1: 64996996f5c370b09ce49cd536786ad46aabfa56 SHA-256: cc784e0b0f15bcc0a2caff4799907a4f77c157704173bc94135f1801ca2e33d2
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.co/app/431946152/how-to-get-free-robux-on-android-without-human-verification-game-hack. The document body and heuristics indicate a lure for 'free Robux' or 'game hacks', often used to disguise phishing or malware distribution. The presence of a download button lure and password protection instructions further suggest a malicious workflow designed to bypass security controls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-get-free-robux-on-android-without-human-verification-game-hack In PDF document text
    • http://gts.edu.gh/library/repository/free-robux-givway_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-without-human-verification-india_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/get-a-free-dominus-from-roblox-toy_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-robux-for-free-legally_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-obc-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/lvl7-roblox-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-teasurenhunt-simulator-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-inf-jump-hack_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_002_off000034f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34F2 22784 bytes
SHA-256: 9455bbeb6f901a102473110c3f113e35bdc73b9cfb94d51f2663a1d1105274df
font_01_sfnt_off000067ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67CA 20036 bytes
SHA-256: 1ca023c78596407e7e8db3a2ff52eac67b7340478b1eb83c2e9b706e1ee0d4c7

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