Malicious PDF — malware analysis report

Static analysis result for SHA-256 c668172e71d3feb6…

MALICIOUS

PDF

41.0 KB Created: 2021-05-12 20:35:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8f33f3fc4901bb158f9e6c5e46b1a51e SHA-1: 0ecf350aec4384ec5e3a1eefa6ef834323b45405 SHA-256: c668172e71d3feb64bff121fff9b63d64a0447a8b4220b2ec599ede94bf896c0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks or generators. The heuristic firings confirm the presence of malicious redirector links and a lure for game hacks. While no scripts were explicitly extracted, the PDF structure itself contains embedded URLs that lead to potentially harmful content, likely intended to trick users into downloading further malware or engaging in scams.

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-com-game-hack In PDF document text
    • http://papelesyempaques.co/images/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://papelesyempaques.co/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • http://papelesyempaques.co/images/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/today-coin-master-free-coins-link_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_off0000463a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x463A 24836 bytes
SHA-256: cae4ea3c8661ea40e24af4f1775e91e8eaef6600db27691ba0d76c53b1d5eb6f
font_01_sfnt_off00007e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9E 17976 bytes
SHA-256: 45fb09c74bd87b01c52ca74746e6a63f33f4f39ca5a35778be362b225ed307d2

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