Malicious PDF — malware analysis report

Static analysis result for SHA-256 29978aec2385bf85…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 13:38:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1189230539c2b8fec9465f5c28a24247 SHA-1: 5cfb3509c73202e24d3d0c7b35c9e34f6ca585e5 SHA-256: 29978aec2385bf853b98ffd7f4b278bde257df3482b551efc098ab436d4e76bd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, which in turn hosts other malicious PDFs. The document body explicitly mentions 'Roblox Flood Escape 2 Hack' and includes the primary malicious URL, indicating a lure for game-related cheats. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/roblox-flood-escape-2-hack-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/robux-cheatsclubroblox-hack_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/earn-rbx_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-using-inspect-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/instantrobux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/top-roblox-anti-cheats_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-high-school-money-cheat_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-generator-2021-no-human-vrification_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/pubg-uc-new-freepik_GM1330123889.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-any-amernation-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-mobile_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_off00002ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED3 21880 bytes
SHA-256: 0c8972625a4fc43d70fb9705b8f9775e7806e27645a2975fcefaef0b376b8b02
font_01_sfnt_off00005f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2C 19108 bytes
SHA-256: 16ac13b413e1c88641692c2befa28525f9a9c595c1b74546745c7af7ee4b1362

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