Malicious PDF — malware analysis report

Static analysis result for SHA-256 49807494cecabc13…

MALICIOUS

PDF

46.1 KB Created: 2021-05-16 09:32:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: aed53d1807bbc0aa100ce539d0716b54 SHA-1: 08a799436c4ed8f0b504143abe9e665bb228a013 SHA-256: 49807494cecabc13497cff733cd050ac788e4139644b178f0ac0ff366cf723cb
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 0.9432

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/coin-master-free-spins-link-download-game-hack.
  • 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.xyz/app/406889139/coin-master-free-spins-link-download-game-hack PDF link annotation
    • http://ltdirect.co.uk/images/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ltdirect.co.uk/images/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://ltdirect.co.uk/images/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://ltdirect.co.uk/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ltdirect.co.uk/images/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://ltdirect.co.uk/images/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://ltdirect.co.uk/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://ltdirect.co.uk/images/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://ltdirect.co.uk/images/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://ltdirect.co.uk/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://ltdirect.co.uk/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://ltdirect.co.uk/images/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://ltdirect.co.uk/images/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://ltdirect.co.uk/images/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://ltdirect.co.uk/images/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://ltdirect.co.uk/images/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://ltdirect.co.uk/images/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://ltdirect.co.uk/images/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://ltdirect.co.uk/images/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://ltdirect.co.uk/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d16.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D16 25484 bytes
SHA-256: d43291ab22d89024f5b41873035d403cee6cb91777aab0b301cde7f022231ac9
font_01_sfnt_off000086de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86DE 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00009080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9080 18636 bytes
SHA-256: e0ee4d28e9fbd90893640acb023fdb3433a7d18e360fd79b0a1965f7934d0c46

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