Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa366869258c492…

MALICIOUS

PDF

33.0 KB Created: 2021-06-29 06:40:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7dbf14dfbb6637ce06abf49bb9b09885 SHA-1: a21bbeb6495f4ad4399ab4363ea6a8521181c339 SHA-256: cfa366869258c492e67dc986e37878702a408cee9ee6dcba8f0d77ec19cb462d
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 0.9824

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.co/app/431946152/roblox-free-script-for-part-game-hack PDF link annotation
    • http://digilib-ppsunisma.ac.id/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/robux-hack-fake-credit-card_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/2021-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-20210-robux-esay-and-fast_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/robux-hacks-that-actually-work_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-cheats-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-ultimate-gamer-365-new_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-how-to-make-a-slient-aim-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/hacked-version-of-roblox-ios_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-scam-text_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/nopde-engine-roblox-hackes-prison-life_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-roblox-accounts-with-bc-list_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-hack-roblox-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-redeem-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_off00002a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A58 22232 bytes
SHA-256: 860e627eb95bfad116c7ee90603251d98a32d867e3e9cf00209c7826a1070a31
font_01_sfnt_off00005bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB9 19204 bytes
SHA-256: b340c02971f4c3b67f13967bfde09f11ca981d968457e74ea5d80b37deb2c3bc

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