Malicious PDF — malware analysis report

Static analysis result for SHA-256 1834d5dd7a1f3237…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 08:37:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 7b032c05cd3fdfa6e0e37491be4d16e9 SHA-1: 153c871827b47297fa6f4aba6fd437a1a8a1a631 SHA-256: 1834d5dd7a1f3237e5acf37f11118947ec4fbb5f217b6c0fb92e2f76203f10ca
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 0.9865

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.online/app/406889139/static-moonactive-game-hack PDF link annotation
    • http://oca.undil.tl/repository/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-minecraft-generator_GM479516143.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_004_off00005250.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5250 24884 bytes
SHA-256: 2a83bcc9de34f01672f970903fa4d7f8996d832a7ede405cfac0974e1792c683
font_01_sfnt_off00008b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2E 17660 bytes
SHA-256: 566e41496f2ce4db5bf6689ca7f7f854e6f85c22f14e9f322398956df4889350

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