Malicious PDF — malware analysis report

Static analysis result for SHA-256 832da297a83277b2…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 04:04:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a7f5b95659b1d6f5312027d672d1a2da SHA-1: b85a6f11cb818c137d1b15d4effd93171fba5141 SHA-256: 832da297a83277b2714d86bc690fdbaf838f696b7b1fa9a0db30ff1299ff8a48
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to redirector domains, masquerading as "free generator / game hack" lures. These links likely lead to malicious sites designed to exploit vulnerabilities or deliver further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/free-accessories-roblox-game-hack In PDF document text
    • http://www.tdbaska.hr/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/how-tom-change-birthday-on-roblox-under-13-without-hacks_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://www.tdbaska.hr/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • https://www.tdbaska.hr/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/master-coin-hack_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-robux-download_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/coin-master-free-spins-2021_GM406889139.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_004_off00004ef2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EF2 26808 bytes
SHA-256: 652c73864e6abc64086bc9d82faecd7ca1e5119de9dd925904659175a0a24d88
font_01_sfnt_off00008df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF1 18068 bytes
SHA-256: 1bea2de0f546621612e5e0cbd01172ecf5f1ab9f5485e5c32d3a5168ac155f59

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