Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08a1a9629ea1802…

MALICIOUS

PDF

43.7 KB Created: 2021-06-14 01:55:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d5b3bf38cfd41db56564db04f1b84c62 SHA-1: 6b39df4a6dcb7998564d5084a59ab1c70375765f SHA-256: a08a1a9629ea1802466be60f2984893d9160987c95f3459d5c8edf2992e0d974
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links that lead to known malicious redirectors and sites offering game hacks and exploits. The primary lure appears to be related to Roblox and Coin Master, aiming to trick users into clicking through to potentially malicious content or phishing pages. The document's structure and embedded URLs strongly suggest a social engineering tactic to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.co/app/431946152/free-cool-roblox-exploits-game-hack In PDF document text
    • http://ycstamping.com.tw/image/data/files/free-candy-roblox-id_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-2021-no-scam_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-website-real-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/i-want-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

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
stream_003_off00004930.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4930 27792 bytes
SHA-256: 6f5b1b148e1d6279cdb7e5ae210628e4d6319755f59bbbe6d37329ea17ae3ee7
font_01_sfnt_off00008834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8834 18348 bytes
SHA-256: 950c06b8abedf7fd35a801aadb6d900f2c4ad55b8246053e02e0b2d2d7e2ca88

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