Malicious PDF — malware analysis report

Static analysis result for SHA-256 6654e025420bc8a0…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 15:45:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 293eb19cf90924fa2e23feadc8a837ec SHA-1: 6c1a2a0706c9029dc2de16e6fc4b346752c82c1e SHA-256: 6654e025420bc8a0c20dfbcb9988cf9ef13ef9ed21125c1253554e531710aa1f
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links that redirect to malicious infrastructure, primarily promoting game hacks and free currency generators for popular games. The document body and heuristics indicate a lure to click these links, likely leading to further malicious content or downloads. The presence of multiple redirector links and the ML classifier's high confidence score support this assessment.

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 http://netcdn.tw/app/406889139/coin-master-daily-free-spin-and-coin-link-haktuts-game-hack In PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/roblox-halloween-simulator-cheat_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/games-that-give-you-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/guest-pants-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/como-descargar-hacks-para-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-get-a-mythic-for-free-in-assasin-roblox_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/easy-robux-hack-on-android_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-use-cheat-engine-67-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/free-robux-no-verification-2021-ios_GM431946152.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_off0000315c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315C 22804 bytes
SHA-256: ecdc0cb4fe1803df1d50aa93716928b33ac0de5fb8145ae095637b779a4d2858
font_01_sfnt_off00006471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6471 19080 bytes
SHA-256: d6f1d0e67441c4e04be5384a6967ad578c6c3f351da098e8418bc6d7f2926cf4