Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba259ee28dd4fc55…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 15:32:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c23dc442cb36c86b588bb8d387b27465 SHA-1: 1e2f38dda6a187bb9759c9d3f19c62671c11174c SHA-256: ba259ee28dd4fc55bebad62b6ecef1185a7a7af18194cc0038023432efee55c5
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, which is designed to lure users into clicking on promises of free game currency or hacks. The document body and extracted URLs strongly suggest a phishing or scam attempt, likely leading to further malware or credential harvesting. No scripts were extracted, but the presence of malicious links and the lure indicate a high likelihood of a malicious workflow.

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/hack-coin-master-for-iphone-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-no-hacks-or-human-verfication_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-catalog-free-stuff_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-lcoins-hack_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/website-that-gives-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/master-coin-hack-mod_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_off00002fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFF 22796 bytes
SHA-256: 3b3f9edb5264037693549ead339fde5d35b1f38f2e382d5190f01a077b5a00cd
font_01_sfnt_off000062fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FE 18512 bytes
SHA-256: 2705ed5b3631f76f4077d5fea6ffa0432e5092c00014600fb4d580f93b2b78c7

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