Malicious PDF — malware analysis report

Static analysis result for SHA-256 c89a5ae308cb7f73…

MALICIOUS

PDF

44.8 KB Created: 2021-06-09 09:08:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: de42f314c7cfac2ae6cda2967cc620e2 SHA-1: 3b2fc7480d11d3f1de7aa63a3ca85def2f2e869c SHA-256: c89a5ae308cb7f73bbeae4c4452356ecf344109debb61265fd07901ae5d0e1be
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 0.9865

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 https://netcdn.tw/app/431946152/free-robux-codes-genorateor-game-hack PDF link annotation
    • http://projectunionstreet.com/library/repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-coin-master-gold-cards_GM406889139.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_off0000504c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x504C 25508 bytes
SHA-256: b7291f7a6d2ca760225afa3fa779e225d7d4f2fedaf307ca65eb5ab15feef6a7
font_01_sfnt_off00008bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB6 18520 bytes
SHA-256: 1c25fc10cbc7d9d0374bcdf27ae43ed9c15c29ea4d1fc113120e8f54655ee57b

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