Malicious PDF — malware analysis report

Static analysis result for SHA-256 c846e076ebcc9b49…

MALICIOUS

PDF

35.0 KB Created: 2021-06-27 03:08:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bb136aa230f4e790f9c195955ba055e5 SHA-1: 4c51e58f45455553ad7a210d7d358e42b4ca1db5 SHA-256: c846e076ebcc9b4945c917abcf2b2745955dc85960dbf63e91fef6962d7886e7
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.co/app/431946152/roblox-8th-gym-hack-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/buy-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-weird_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-commercial_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-ro-hack-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-roblox-on-phone-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-through-walls-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-highschool-hack-script-pastebin-money_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-hat-in-roblox-2021_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_off00003181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3181 22092 bytes
SHA-256: 47e3e7ed19a7845b1da2b38402f4558980ce2597507049e559eef543672a7184
font_01_sfnt_off00006252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6252 19576 bytes
SHA-256: d42095b6456bb62ccdb8437be6294914b2bb35d4e18034a1be817551edf4b5d0

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