Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd9e674f276ad72…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 11:55:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5ba31bf7cfc708f7aa629887ef628e91 SHA-1: 2d71804f5d37d17159e1218ec27ac16c6f4184c0 SHA-256: 0fd9e674f276ad72012ea935de1026b3077bd28493ce4d317838b7d3add4f54f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/431946152/free-robux-no-email-no-password-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/hack-roblox-admin_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-premium-account-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-2021-for-pc_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-weight-lifting-simulator-3-cheat-codes_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-free-real-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-for-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-ad-maker-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/only-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-hack-unlimited-jump_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-roblox-hack-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/rbxcity-free-robux_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
font_00_sfnt_off00002d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D81 22064 bytes
SHA-256: 9c1a7c8095c4585e1100671ffde5c8846ceeeca02a69fdbc54e1d075a635d8da
font_01_sfnt_off00005e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E46 19664 bytes
SHA-256: 19345aefd42296db4ee34a47fd30ecfb9ef7fa409116f0342d7c97d99a44abea

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