Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed1c98d0754927c…

MALICIOUS

PDF

34.4 KB Created: 2021-06-27 05:02:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0e13b515c42af2f15491c0103da50e0c SHA-1: d7c5f3b3f6079cd1130f10d4b66e2cbf29707741 SHA-256: 3ed1c98d0754927c75bb8862116f0f2f7f879e8a667a1ce1d9fab0a80da4a5c3
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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.co/app/431946152/free-roblox-hack-accounts-game-hack PDF link annotation
    • https://allpromise.com.tw/image/data/files/find-what-game-a-roblox-player-is-playing-hack_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-hack-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/pick-a-side-hack-roblox_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/hacks-on-robloxs_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.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_off00002e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E8E 22672 bytes
SHA-256: 1ac8bf05d68346adb1bac4ef589225d1dfee7fefa87202479242f6ef322c598e
font_01_sfnt_off00006169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6169 19064 bytes
SHA-256: e0b73fcdab49366e6cda1de2c04ff5cb868282d89dfedde5bba1ee23c3e14943

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