Malicious PDF — malware analysis report

Static analysis result for SHA-256 77d072fa18cc3904…

MALICIOUS

PDF

41.5 KB Created: 2021-05-10 17:49:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 08e09331481101a4261cc4a8ace3ba5a SHA-1: d01475a1fdabc1353a9d4be557e6f649b90f1d8a SHA-256: 77d072fa18cc3904f7cfb06879c6bd48dfe9ec1d87a793b1a3068ae311d2d6fc
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document contains multiple links to known malicious redirectors and game hack lures, aiming to trick users into downloading further malware. The 'SE_CLICKFIX' heuristic indicates the document likely instructs the user to manually execute a command, a common tactic to bypass security controls. The primary malicious URL identified is https://netcdn.xyz/app/479516143/minecraft-windows-10-free-with-java-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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-windows-10-free-with-java-game-hack In PDF document text
    • http://mohacad.hu/images/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/getrobux-come_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/how-to-get-minecraft-dungeons-for-free_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
stream_003_off0000447d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x447D 25148 bytes
SHA-256: 47eaff5a243c60348e38cfd4639265c9c178244cf7ee6da2baf6fd51a9872d1e
font_01_sfnt_off00007e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3A 18972 bytes
SHA-256: ec0d7e7957d6d3ec4a312ebe7c12434b242d64f4f861d318395950ba1ef4cb73

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