Malicious PDF — malware analysis report

Static analysis result for SHA-256 58b9c99b60f8d231…

MALICIOUS

PDF

43.8 KB Created: 2021-05-12 21:54:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 892e070a52c88353cd1d4461795c2163 SHA-1: e3438c6750c24c1193c97d88157f19187c93a45b SHA-256: 58b9c99b60f8d231c2848e35f33bedcf7dc3b4d931c403d5bcba0abe5927fc59
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, including one that masquerades as a free game hack generator. The document body and embedded URLs suggest a lure for users seeking cheats or free items for popular games, which is a common social engineering tactic. No scripts were extracted, but the presence of malicious links indicates a high likelihood of leading users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/479516143/free-online-games-like-minecraft-game-hack In PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/give-free-robux_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/master-coin-free_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-free-spins-android_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_003_off00004958.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4958 31484 bytes
SHA-256: 4d26310332a70cb72dbc94346a654823f862e4a671f38ac2ae89a25c2f40cbab
font_01_sfnt_off000089b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B6 18072 bytes
SHA-256: 246b849e2f56f6dfbc2c344cbb2402d5c34ee1f8458d292b794ed9a5a308c484

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