Malicious PDF — malware analysis report

Static analysis result for SHA-256 01832bf83e3fc68f…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 15:11:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3bceba3a9cd1140de2c3b0d672680ab0 SHA-1: 73c8e26a77ecf6e66f36408336d482d192c116f4 SHA-256: 01832bf83e3fc68fd1d27a555df88ad9b9d8e75f463e8ff7d857d5366b3569e3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a potential for further malicious actions, such as downloading additional payloads or redirecting to credential harvesting pages.

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/406889139/how-many-free-spin-links-is-there-for-coin-master-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/roblox-i-want-to-break-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-face-codes-to-get-for-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-rpg-games-to-steal-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/pokemon-go-free-balls-2021_GM1094591345.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-hack-really-works_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-anime-cross-2-hack-money_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-free-app_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-who-hacked-jay-tophat_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/https-pastebin-com-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-free-bird_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-lvl-7-script-executor-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-admin-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_off0000307f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x307F 22948 bytes
SHA-256: ca2fc465b9db76c1696d0c736ae56a196d0cfe1e20d5702e580027ac067584d0
font_01_sfnt_off000063dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DC 18856 bytes
SHA-256: b32cc0524e71b3acdf0060969819861c2abcec109ad457db8aa635e3627cbc9a

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