Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b31f457bdee3143…

MALICIOUS

PDF

42.2 KB Created: 2021-05-15 22:34:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: be70e12964e2070f49ee446bf70a7059 SHA-1: cb458a2436ebb954b69c5856dff2f9c904ce5f40 SHA-256: 3b31f457bdee3143f7e2b3ad99604f7c3156a956ba4b11e80a5484b7efb79ee5
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/free-spin-coin-master-app-download-game-hack PDF link annotation
    • http://mcdougalfamily.site/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://mcdougalfamily.site/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://mcdougalfamily.site/images/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://mcdougalfamily.site/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://mcdougalfamily.site/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://mcdougalfamily.site/images/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://mcdougalfamily.site/images/hack-client_GM479516143.pdfIn PDF document text
    • http://mcdougalfamily.site/images/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://mcdougalfamily.site/images/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://mcdougalfamily.site/images/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://mcdougalfamily.site/images/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • http://mcdougalfamily.site/images/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://mcdougalfamily.site/images/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://mcdougalfamily.site/images/www-robux_GM431946152.pdfIn PDF document text
    • http://mcdougalfamily.site/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://mcdougalfamily.site/images/roblox-g_GM431946152.pdfIn PDF document text
    • http://mcdougalfamily.site/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://mcdougalfamily.site/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://mcdougalfamily.site/images/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://mcdougalfamily.site/images/coin-master-free_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_off00004884.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4884 24792 bytes
SHA-256: 655e4f45c15927ec093022408268b8bad500a550d8488720888ef5c101accec9
font_01_sfnt_off000081dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81DC 18464 bytes
SHA-256: 5d479065cf79f2f9a0a9ab9e4084ffa9868228cef0b1d352b42e78b889d944c6

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