Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee67751cabd2df62…

MALICIOUS

PDF

53.0 KB Created: 2021-05-11 16:01:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7c68d45f2499ba3b6fa8201d0f80aeb5 SHA-1: 1e1e0b4d4f00540fb08e68abdf9d6a451e21a316 SHA-256: ee67751cabd2df62e84a0e40ff1119648e96a05a2d32e7bb673ba62a279bed01
142 Risk Score

Malware Insights

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

This PDF document employs a common lure of 'free Robux' or game hacks to entice users. It contains a large number of embedded links, many pointing to other PDF files, suggesting a link farm or redirection scheme designed to lead users to potentially malicious content or exploit kits. The primary URL and the linked PDFs are flagged as IOCs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9231

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 https://netcdn.xyz/app/431946152/how-to-get-free-robux-2021-easy-game-hack PDF link annotation
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/coinmaster_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/freerubux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmatholiulhudabugel.com/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • http://wolfzscriptsIn 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_off00004f4d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F4D 28036 bytes
SHA-256: 9cdc003ea78d7e8bfa0aeb354895beaed607b86050a283bfcb0292847b941025
font_01_sfnt_off00008f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F65 8304 bytes
SHA-256: 6060e850a77f13d0999662eb5566c8de25f01ea8818f94a5bbe47d1cad3159a0
font_02_sfnt_off0000aaa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAA9 19092 bytes
SHA-256: cc4041fc50bd2ea9a1268967e32916156e3a634973a216864dd7f220ceb04504

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