Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5829c5d1dd79e3f…

MALICIOUS

PDF

44.2 KB Created: 2021-05-14 12:54:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4eab39a84cadcef40411afacd073ff21 SHA-1: 6b9b8c22922eaf17d1dbe4274a5caedb32fdd89e SHA-256: d5829c5d1dd79e3f7cef3f141e8d66e9d6222fc817573fd5eaeca0058566eb1a
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external resources, including a known malicious redirector, under the guise of game hacks and free generators. The document body and heuristics indicate a lure to trick users into clicking these links, which likely leads to further malicious content or phishing attempts. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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.
  • 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 https://netcdn.xyz/app/406889139/is-there-any-tricks-or-working-hacks-for-coin-master-game-hack In PDF document text
    • https://studentcareerinfo.com/images/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://studentcareerinfo.com/images/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • https://studentcareerinfo.com/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://studentcareerinfo.com/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://studentcareerinfo.com/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://studentcareerinfo.com/images/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://studentcareerinfo.com/images/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://studentcareerinfo.com/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/robux-robux_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • https://studentcareerinfo.com/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://studentcareerinfo.com/images/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://studentcareerinfo.com/images/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://studentcareerinfo.com/images/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://studentcareerinfo.com/images/free-online-spins-coin-master_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
stream_003_off00004bbe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BBE 26676 bytes
SHA-256: 29aab298b16d1e5b286318e1b90d7bfc4c29f013f69bd9487e723b6fdb3aaafb
font_01_sfnt_off00008979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8979 18712 bytes
SHA-256: bf9b6bef81a86b28c31fcdcf4878edb32919432b4a7a59645f7f2c7dbce8e9d8

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