Malicious PDF — malware analysis report

Static analysis result for SHA-256 d82237ff76bdc49a…

MALICIOUS

PDF

36.6 KB Created: 2021-05-22 15:40:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 6bf466694d94eac1a837bca7be4a2ffb SHA-1: 6fe9dace29e6be9372b3fa4bff0ae3cea34e19a4 SHA-256: d82237ff76bdc49ae8a98cd8bcad3258d876a74775a6a87bad832f6c85f4b4c9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generators' and 'game hacks' to entice users. One prominent URL, 'https://netcdn.xyz/app/835599320/get-free-tiktok-followers-game-hack', is flagged as malicious. The document body and embedded links suggest a social engineering tactic to trick users into downloading or accessing further malicious content, likely a downloader or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7067

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/835599320/get-free-tiktok-followers-game-hack In PDF document text
    • http://agritrade-ukraine.com/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f7c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F7C 23312 bytes
SHA-256: 2c5d58a610a945cbc96be285da485fa7097e59ff1a3672a6be953b360fda666d
font_01_sfnt_off00006435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6435 3124 bytes
SHA-256: d6dd29adb69da7f9a23a5e3791282a61e2f811794f560a0c409c8747766d9102
font_02_sfnt_off00006eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEE 17692 bytes
SHA-256: 02c3cedea4a2807b323b614e41e6797ad921ddb65350057b59541dca36dbbb9a

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