Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3af6b85e3fd241…

MALICIOUS

PDF

42.3 KB Created: 2021-05-11 23:33:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 587ec4584e397a2bd529793a1322564e SHA-1: 77a96f725cd7935dcd74cdfa6d5c7e0235457747 SHA-256: bb3af6b85e3fd241a8705b4a5da64e8701ed8b16b98fd56eb20461f9e83e7603
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-daily-free-spins-link-today-facebook-game-hack PDF link annotation
    • http://reisebild.eu/images/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/robloxfun-com-robux_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://reisebild.eu/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/give-free-robux_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/simplysarc_GM479516143.pdfIn PDF document text
    • http://reisebild.eu/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/win-free-robux_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/roblox-ban_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://reisebild.eu/images/robux-hacks-2021_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_003_off00004a66.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A66 24112 bytes
SHA-256: c2b47a2a69309ca9d37638dacbe390518456718415fd55d4c8027019dad119e5
font_01_sfnt_off00008173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8173 18808 bytes
SHA-256: 4857649f58737dfd5d3cde565af8420aeb724b61b1648601542f846ee8275f41

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