Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd874feaca141cc…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 04:14:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b2ee45a446a48e4b5919e7a69e5c85e7 SHA-1: 9c88034225ead3ff2482ed5d9f310a8f0c59985b SHA-256: 6fd874feaca141cc771d68dd4f3ab20c528ac4e279532d7970bd6d04d368ef82
160 Risk Score

Malware Insights

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

The PDF contains a lure for a 'game hack generator' which redirects to malicious infrastructure. This infrastructure hosts multiple other PDFs, suggesting a chain of malicious documents designed to trick users into downloading further malware. The ML classifier strongly indicates malicious intent, and the embedded URLs are associated with known malicious redirectors.

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/406889139/how-to-get-more-free-coins-on-coin-master-game-hack In PDF document text
    • https://key8013805.com.tw/upload/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-get-the-tix-beanie-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-get-money-on-roblox-with-cheat-engine-63_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/http-bloxy-site-free-robux_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/roblox-jailbreak-cheats-download_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-roblox-girl-faces_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/roblox-robort-free-mega-vip_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/commande-cheat-synapse-roblox_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-robux-paest-bin_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-hack-in-roblox-walk-through-walls_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/hack-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/roblox-give-btools-with-cheat-enigene_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-hack-to-get-nightblade-in-murderer-mystery-roblox_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_off00003249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3249 23324 bytes
SHA-256: 22d0af61273136b10fd1e2454e8419b97d1070b75118afb47503d056e9125cc8
font_01_sfnt_off000066ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66AB 18164 bytes
SHA-256: 87539b2ce36dbba66f075720f9556e36c071cb06377775487ffba75d6ed8d31d

Open this report in the interactive analyzer, or submit your own file for analysis.