Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6150e7192cd915…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 13:10:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 522070f24872440142d99fd26a78f062 SHA-1: abcd302005b426fefb864d8b4039fc31aade9b15 SHA-256: ab6150e7192cd915f99585aa19f294f110dfecef42db92c700e4dcbd45421e67
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites that claim to offer game hacks and cheats, such as 'coin-master-hack-mod-game-hack'. The presence of a 'password-protected archive' lure suggests that the document may be intended to trick users into downloading a password-protected file, which often contains malware. The document body and embedded links strongly indicate a social engineering tactic to drive traffic to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://netcdn.tw/app/406889139/coin-master-hack-mod-game-hack In PDF document text
    • http://library.acehresearch.org/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-cheat-engine-patch-bypass_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-on-roblox-no-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-december-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-robux-with-cheats_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-working-strucid-aimbot-hack-2021-agust_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-hacks-for-phantom-forces_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-no-password-easy-obby-june-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-online-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-best-hack-for-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-hack-program_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/lohith-gaming-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-promo-codes_GM431946152.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_002_off00002efd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EFD 23252 bytes
SHA-256: d1781df9e95126441d45c4230b62ab195bed820dfd4720a5490023660b7e3817
font_01_sfnt_off0000632c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632C 18180 bytes
SHA-256: ec137eb2004e83444d05fb4d1e1b75aa4a0bc16b796b44a7b6f5e0d56e626e81

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