Malicious PDF — malware analysis report

Static analysis result for SHA-256 03af1bdb5843c77a…

MALICIOUS

PDF

33.7 KB Created: 2021-07-08 00:37:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2167dcd06ec84c644231229cdcf55829 SHA-1: fe2f207be83e238d5cab9104ad2dc965f1223ae5 SHA-256: 03af1bdb5843c77a830cdcf7fb14d837e5ecb7f0a536cec7002c21edbe746e5d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and generators. The document body and embedded links strongly suggest a lure to trick users into visiting potentially harmful websites. The ML classifier also flagged this PDF as malicious with high confidence.

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/431946152/free-things-on-roblox-game-hack In PDF document text
    • https://mbbs.hr/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-hack-for-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/tiktok-free-iphone-12_GM835599320.pdfIn PDF document text
    • https://mbbs.hr/files/cheat-engine-64-roblox-bypass_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
    • https://mbbs.hr/files/zephplayz-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-kick-a-hacker-in-a-server-roblox_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-accessories-on-roblox_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
font_00_sfnt_off00002d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D4D 22412 bytes
SHA-256: ae1be984fc3887b1ba43f089710f8730fe5bfa733c7048e127462bfe9d63741d
font_01_sfnt_off00005f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3E 18936 bytes
SHA-256: c4e611ffc66a9f2ae011f0cbe0d3da0ebe01f9ded7cacf33f871c84d0f478745

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