Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff58582c95d5880…

MALICIOUS

PDF

47.1 KB Created: 2021-05-19 03:40:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e6ae07d13ddea5d21cabfa4345cd4140 SHA-1: aa6df80d0e87d57bb446bd1b6c98b521ff554623 SHA-256: bff58582c95d5880c837b18dc6e24e1b28c79bc1f22278c349768d8caea48931
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on game hack and cheat generators, a common social engineering tactic. The primary link directs to a known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to drive users to potentially malicious websites for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/coin-master-cheats-2021-game-hack In PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000050bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50BD 25888 bytes
SHA-256: fff6bfc50b20f3b19b194996c97778c88df1d6ecfc4068dd3bff4b178b0861bf
font_01_sfnt_off00008c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C21 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000960b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x960B 18112 bytes
SHA-256: 8fd2be34c5ae6d36bafabdc0d90731bcc2dba590b40522d9b75e2e7b006908cc

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