Malicious PDF — malware analysis report

Static analysis result for SHA-256 05caf9af8c902127…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 19:23:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 77963a139307225a3439dfda5077fe24 SHA-1: 0f9d8a0f16f94f9a7c7b7495ea0e31876f72f2bc SHA-256: 05caf9af8c90212746a9bda866be1ee336105eae30e551bce8b95d69d769ad00
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and free currency. The heuristic firings indicate that these links are designed to lure users into clicking on potentially harmful content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest an attempt to direct users to a malicious website, likely for further exploitation or credential harvesting.

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/coin-master-free-coins-app-game-hack In PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/mcpe-client_GM479516143.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/frre-robux-hack_GM431946152.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://elearning.minkotabukittinggi.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-ios_GM479516143.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_off0000338e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x338E 22756 bytes
SHA-256: 22f4dfedde73f985608f030c5192e74d70beef78a2d85df4d1d860959ced2931
font_01_sfnt_off00006660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6660 18176 bytes
SHA-256: 78fd92e643045a663d15c45c74126e1d779604aea3e1437bd5d883e9616c0973

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