Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce297195244112c…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 18:30:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9e6dac97e4043b258f844796d01b0e14 SHA-1: 1a2eb1541b00da74401ed94c0b1216f3657fcbbf SHA-256: 7ce297195244112ccf931ac00ec5fa000f91a008f67748bad75a0ecbf0f2e7ab
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and generators. The document body and heuristics indicate a lure to download potentially unwanted or malicious content. While no scripts were explicitly extracted, the nature of the links suggests a potential for further malicious activity, such as downloading second-stage payloads.

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-script-hacks-game-hack In PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-hack-2021-redeem-card-codes_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-hacks-for-medieval-warfare-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-robux-on-laptop_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/cheat-codes-for-bank-tycoon-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-download-roblox-tshirt_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-codes-youtube_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/easy-robux-today-hack-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-spins-link-today-new_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
font_00_sfnt_off00003331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3331 22060 bytes
SHA-256: 00dda7a9bb7bf836d4d5bb203d83595ab250f142863d66e3cc94a2d865098e68
font_01_sfnt_off000063ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63ED 19056 bytes
SHA-256: d579aac1d1158a15ad46381a3b3d03b5c9b37299ce5790291e99ad749e5be703

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