Malicious PDF — malware analysis report

Static analysis result for SHA-256 f50f9db6ce540f9e…

MALICIOUS

PDF

45.7 KB Created: 2021-05-15 01:26:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5a3aeab5bbb8563551eab4d0dff620c4 SHA-1: 69062b37ad082f3b603eeead4325f9a294837113 SHA-256: f50f9db6ce540f9e6a1ef3c88fdf58d6dd43bd7bf90f6dc4a152266825be27d6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains and websites that promise free game resources, a common lure for phishing or malware distribution. The heuristic firings indicate that the PDF is designed to redirect users to malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lead the user to a malicious download or exploit page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/406889139/coin-master-free-spins-deutsch-download-ios-link-game-hack In PDF document text
    • https://newenglandafs.com/images/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/com-roblox_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/make-free-robux_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-free-spin-and-coin-link-2021-today_GM406889139.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_003_off00004928.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4928 26368 bytes
SHA-256: 4bb3b98b792c8fe8d10d71cbf04013e81cb0a3bd85070e74fad5ddf1d7b0faa1
font_01_sfnt_off00008398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8398 3124 bytes
SHA-256: 9967c6221325a4ff3f7c4336922605f990450164c2eee2df708cc81823c6ec98
font_02_sfnt_off00008e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E77 18944 bytes
SHA-256: 8404235b8cfd74d6d6f1010ca69935ae214dcf577c73904f30617ca7dbf1d164

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