Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4599539c4436dde…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 20:18:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d93fcd6b48ae51e0577fb041ea5ad324 SHA-1: b7477d4e0042b746089ac76a90a9a729af04b959 SHA-256: f4599539c4436dde0e60de4af10a616d9314b3a1b96d739cbae1c37e7756a527
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and free spins, identified as malicious redirectors. The document body explicitly mentions 'Coin Master Free Spins Activegamer' and includes the primary malicious URL, indicating a lure for potentially harmful content. While no scripts were extracted, the presence of numerous malicious links and the ML classifier's high confidence suggest a high likelihood of this document leading to malware or further compromise.

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-spins-activegamer-game-hack In PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/roblox-source_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/goo-gl-wx0ofq-free-robux_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-get-a-free-private-server-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-noclip-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/roblox-free-money-hack_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/websites-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-free-spins-link-2021-blogger_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/roblox-rocitizens-hack-money_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-roblox-intros_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_002_off000033a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33A7 23496 bytes
SHA-256: 048271de3f4723e6fdcfbd13f62d979666625fe5126b3d98b9cdab5d3f47c180
font_01_sfnt_off000068e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E4 18548 bytes
SHA-256: 85433ac8e2cde4db0bf7edc9f1398718ea4df069310ae2c497be062e8b4ae894

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