Malicious PDF — malware analysis report

Static analysis result for SHA-256 156fd07e72da9fac…

MALICIOUS

PDF

47.9 KB Created: 2021-05-13 17:32:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5d897be98737a64a0658616d5d7d9ae9 SHA-1: 6b7ffbc6ffe64d3ee49f85a8affee88c60c5e647 SHA-256: 156fd07e72da9facfaaca44c555ee0a30e17ee9ab8962b193451562c0dc73d35
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 0.9013

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/479516143/minecraft-hacked-apk-game-hack PDF link annotation
    • http://sarny-rada.org/ckfinder/userfiles/files/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/coin-master-free-spins-1701-20_GM406889139.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/wurst-112-2_GM479516143.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/getrobux-now_GM431946152.pdfIn PDF document text
    • https://freegiftcodes.euIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004efc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EFC 31480 bytes
SHA-256: e8806f0720b5d45ad294967d6f651c3247665b9120b6098e131a38b3636fda1b
font_01_sfnt_off00008fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB3 2880 bytes
SHA-256: 240c720d23f6d6b8a6b042f7c787c9fd4108cb68d464435fdf28a73941e6a807
font_02_sfnt_off000099a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99A0 18088 bytes
SHA-256: 9437dee2205271bfc3290dd22414fa0f0047947481f41fe3ac95feb69f08380c

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