Malicious PDF — malware analysis report

Static analysis result for SHA-256 238e54238c751201…

MALICIOUS

PDF

42.7 KB Created: 2021-05-12 03:01:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 38859887b994484bd88e6f3f41a684f6 SHA-1: 00380e5ff7bcc6a1b6f276d993d928a4646dd00a SHA-256: 238e54238c751201a40eb816e6675acd82c9e2214c20da1b00e26986b262cef3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, one of which, https://netcdn.xyz/app/406889139/send-me-500-2021-spins-game-hack, is identified as a malicious redirector. The document body and heuristics suggest a lure for game-related cheats or generators, indicating a phishing or scam attempt. No scripts were extracted, but the presence of malicious links and the lure pattern strongly suggest a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/send-me-500-2021-spins-game-hack In PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/real-robux_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/free-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/roblox-robux-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_003_off00004b99.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B99 25108 bytes
SHA-256: d14c227c8a831e115cc3e341aab3ce89666b646ef9f4414b8ba51703a1498c84
font_01_sfnt_off0000859b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x859B 17960 bytes
SHA-256: dff02ceeee56d5f4ef3a776903bc3b56e18e6822a65b0acf827e633c14aecd45

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