Malicious PDF — malware analysis report

Static analysis result for SHA-256 367187696565d31e…

MALICIOUS

PDF

33.7 KB Created: 2021-06-18 07:16:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 834e487c57cf5e12dfb3fb716122692a SHA-1: 230e4d065dd7f6f2cd7629af65486ff8ef2a0ff3 SHA-256: 367187696565d31e79ac9537a86d7e9d93d44b30fb4653ba012262958ed416a2
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/how-to-hack-the-piano-in-roblox-game-hack PDF link annotation
    • http://pourvosvacances.com/images/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/boku-no-roblox-remastered-money-hack_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/descargar-hack-unu-para-roblox_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://pourvosvacances.com/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://pourvosvacances.com/images/how-to-noclip-on-roblox-with-cheat-engine-64-jailbreak_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/how-to-get-free-robux-inspect-2021_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://pourvosvacances.com/images/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/coin-master-free-cards-hack_GM406889139.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_off00002cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CAC 22472 bytes
SHA-256: ad318e8a06995fb0776c1e62242aa1afb4441a5f34e3a92d0655a019841b820f
font_01_sfnt_off00005ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED1 19072 bytes
SHA-256: 5b23509a3109b9f95067de49b72138fdd259cdc73a691d65fc721a9d87a42e9f

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