Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb1ecce3b670770d…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 17:13:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 12594fda695de121be8c2d3fa61dfc11 SHA-1: 5a55768f87b0031d01d38a484df5e201bb30da9b SHA-256: bb1ecce3b670770ddb9115c93cfb9d9fb10d982ab47f13a77b4e9c57f2f6c406
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, designed to lure users into clicking for game hacks or virtual currency. The primary link, http://netcdn.tw/app/835599320/get-free-tiktok-likes-game-hack, is associated with known malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt, likely leading to further malicious content or malware download.

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/835599320/get-free-tiktok-likes-game-hack In PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-no-human-verification-for-android_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-get-a-robux-hack_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/pubg-uc-hack-apk_GM1330123889.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-case-clicker-hack_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/games-like-roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/tiktok-free-gas-hack_GM835599320.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-without-an-app_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-hack-exploit-project-pokemon_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-prove-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/where-to-find-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-make-fly-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/hack-roblox-pc-download-scripts-no-noclip_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
font_00_sfnt_off00002f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9A 22516 bytes
SHA-256: 6eea35cf30906ecbf22348b7334518c8bf1978bf35b71ba78a5f32c8c54e60db
font_01_sfnt_off00006211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6211 17972 bytes
SHA-256: effacd332746f9e646823f1c7fab4329f91a4bf6ea10d1b4c3cfc7ab1a2a3034

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