Malicious PDF — malware analysis report

Static analysis result for SHA-256 58af77528d11611c…

MALICIOUS

PDF

46.2 KB Created: 2021-05-11 04:01:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 79326137daa12882e429b063e8e155c1 SHA-1: 15ad7d615e46037e4b380a380bf57b08730f9315 SHA-256: 58af77528d11611c1ba38e626d0e4f0cb59635c4387193c2d136a41f18b5a6eb
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 0.9432

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/collect-free-spins-for-coin-master-game-hack PDF link annotation
    • http://www.pspmrsmbpj.com/opac/repository/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/robux-sites_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/claim-robux_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-hack-without-downloading-apps_GM406889139.pdfIn 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_off00004bd1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BD1 25260 bytes
SHA-256: 1bfcba9b8c951d410ab7e8aac724e943d3c298babd9ebc9ff621f1a2a5f87ef5
font_01_sfnt_off000085ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AC 4020 bytes
SHA-256: dbaa9c12d07f3632734605f1d5d6dee3ad5af1f57488e46d95dab68b383f08c5
font_02_sfnt_off00009334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9334 17960 bytes
SHA-256: 56908844ab102c912342fec259dbf5a97100868d5d877c05497f82053eb67f28

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