Malicious PDF — malware analysis report

Static analysis result for SHA-256 44eb9f1f07e29bdc…

MALICIOUS

PDF

45.3 KB Created: 2021-05-13 12:05:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c040f352f03107f00cba7da2317fee86 SHA-1: 518adbdad03586357057697a78a3ba02c8e1952a SHA-256: 44eb9f1f07e29bdc8cc996f65d00b5e7539b06c499053a3e05625ef7b03a574d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically promoting "free generator / game hack" lures. The primary malicious URL identified is https://netcdn.xyz/app/479516143/minecraft-jar-free-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a social engineering attack designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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 https://netcdn.xyz/app/479516143/minecraft-jar-free-game-hack In PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://freegiftcodes.euIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d9f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D9F 25240 bytes
SHA-256: 314a1185107fdc9c7e94ca7e11f1637a2b68402959fa559254ec833728767a36
font_01_sfnt_off0000869b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869B 2840 bytes
SHA-256: 787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
font_02_sfnt_off0000905a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x905A 17736 bytes
SHA-256: 79a8d26c7b4d0bdcab91bfdb774fad33c03b2ac78af62cbe496150d9ab38cc45

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