Malicious PDF — malware analysis report

Static analysis result for SHA-256 d24a6e9ceaf415f0…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 16:28:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 43ea84b6127696214398cf884c771d0b SHA-1: afcd04141cd77932c1a027531aa632de352c1e28 SHA-256: d24a6e9ceaf415f0f1b3f4ae45eb0be2a054adf5e2467a958af247cd4d9cea67
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.tw/app/835599320/free-tiktok-likes-trial-game-hack PDF link annotation
    • https://razredna-nastava.net/files/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-studio-app-free-download_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-cheat-gg_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-hack-week-2021-2_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-hack-someones-profile-on-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-admin-roblox-pc-hack_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-tiktok-accounts-with-followers_GM835599320.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-java-edition-free-download_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
stream_002_off0000304b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x304B 22424 bytes
SHA-256: 33d7265f6af94c1c24646183137bbdda4bc349e68db8702273fbca58f134fa15
font_01_sfnt_off0000628c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628C 18048 bytes
SHA-256: 79ac6f62d09ddaae7b94436d308edb87f31d51d173a73ee189228e1c92a6fbae

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