Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4acd062fa28568f…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 20:14:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b20b94a51c05aa5cf92718eff6a2c45c SHA-1: f63a16c603b056a0320d5a19ed607cc0d5f77137 SHA-256: d4acd062fa28568ff0e02192f35b995a71cebda9927ba079be360aacbc35747d
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/406889139/free-spin-coin-master-game-game-hack PDF link annotation
    • https://www.itc-nekretnine.hr/files/pastebin-com-hack-robux_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-100-robux_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-robux-that-works-2021_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-make-robux-fast-and-free_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/roblox-dowlowd-for-free_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/roblox-phantom-forces-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/roblox-jailbreak-how-to-get-all-cars-free_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-hack-cbro-roblox_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/earnrobux_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_off00002fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB6 22112 bytes
SHA-256: 37330917ee5cedeafc5fe40d33159e31093b01d502b49cfedc8dcd440ca57336
font_01_sfnt_off000060da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DA 18432 bytes
SHA-256: 85223bd49af77d40a0092bd2c3733620e417d7d5fcdc632707b7c4feb3d04c0e

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