Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6fa7d794b7b819…

MALICIOUS

PDF

42.7 KB Created: 2021-05-13 17:38:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: dd337dbaff6918eb06594604c5ccb9ea SHA-1: 8bc4acb9fe3f3b78a0241d30b449b60eb0a13799 SHA-256: 3c6fa7d794b7b819daad36c1e8a8827e309691b3a76dfe00aa24e4806b51596f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for a 'Coin Master Hack 2021 Free' and includes a malicious redirector link. The document body, though heavily obfuscated, contains references to the same hack and a URL. The presence of embedded links and the nature of the lure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-hack-2021-free-game-hack In PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-today_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/hack-coin-master-apk-358_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_off00004bbe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BBE 24880 bytes
SHA-256: 77ebee03989f32f47e81a819c3e634617ec2685ddc015468fead665597255aa3
font_01_sfnt_off000084bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84BB 18284 bytes
SHA-256: 24548c4fb8e2ba96ea34c2ab549c5298a51cd3d4936d0c2ae8965e87a81b14d2

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