Malicious PDF — malware analysis report

Static analysis result for SHA-256 492a52d1bcc2765a…

MALICIOUS

PDF

35.3 KB Created: 2021-07-09 01:15:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7659070a6382332ca63718e60e9396bd SHA-1: 1c0c5915e036cbe8e97f0ab5514d258588c62d58 SHA-256: 492a52d1bcc2765a377ac3bb61c8e09c2aca1d56dc6acfc653e2754c7caed3b7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'generators'. The document body and heuristics indicate a lure to click these links, likely leading to further malware downloads or phishing. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious redirector chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/oprewards-login-game-hack In PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/hack-en-roblox-robux_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/robux-gratis-no-hack_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-no-joke-2021_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/how-to-turn-in-to-super-sayin-roblox-no-hacks_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/free-roblox_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/robux-for-surveys_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000344f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x344F 22264 bytes
SHA-256: 1b7d4bce88289e783f503ec4488c516587808f6790d218e5f92ecff63aa345a3
font_01_sfnt_off000065df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DF 18680 bytes
SHA-256: 045e49a4c4c31e0b2cb524b946194a47b78cf6c5b310be207d27975ae3ba71fa

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