Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5ca3ba28d470ccb…

MALICIOUS

PDF

34.8 KB Created: 2021-07-08 17:59:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 161ec3defcf11c4ae7ea51f06c475dcc SHA-1: 3bbdbd0926e64b56ff24924444d92d0143fc9f1b SHA-256: b5ca3ba28d470ccb4de5801608118bf2a68968b24768a01ae9ab0f4eb2c1c5ee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector pointing to 'http://netcdn.tw/app/431946152/roblox-free-robux-game-hack'. This lure is designed to trick users into believing they can obtain free game currency or hacks. The presence of numerous similar links suggests a campaign distributing potentially unwanted or malicious content. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or scam attempt.

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-free-robux-game-hack In PDF document text
    • http://stitqi.ac.id/website/repository/tiktok-free-3d-model_GM835599320.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/level-coin_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/download-speed-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/hack-to-get-free-spins-on-coin-master_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_off00003171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3171 22628 bytes
SHA-256: 32c8eb5343cd78eac2923787c96a83ad367930f519288b360d1b95216213abe8
font_01_sfnt_off000063f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F4 18788 bytes
SHA-256: 240f26960413d3375b32b54d3a16c3eb3bd7324ec8649811f17e0fe1da2802cb

Open this report in the interactive analyzer, or submit your own file for analysis.