Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd2b414ffeb0e37…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 17:04:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8c712862d93e735bb3d33f961712b147 SHA-1: ea9b823d9bbeffeec8317c47aa5859e7e69385dd SHA-256: cbd2b414ffeb0e37f4d49e9bd37149bd9a6e7ca0087eb15e583263a719b82b41
102 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 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://netcdn.tw/app/406889139/coin-master-35-2-hack-game-hack PDF link annotation
    • http://36.94.36.7/elib//repository/free-coin-master-spins-daily_GM406889139.pdfPDF link annotation
    • http://36.94.36.7/elib//repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/free-pretty-looks-on-roblox_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/robux-earner_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/hacks-para-roblox_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_002_off0000302f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x302F 23748 bytes
SHA-256: e68a45af77bec47097bbc9818cf2a1f9b79002a796acefb59d024d16c39690d8
font_01_sfnt_off0000654f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x654F 18436 bytes
SHA-256: fd3cc82f4c1368dfa344b5ae38f998be07616c2019a2f52b65594bfa2782c451

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