Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf65cb98273838a…

MALICIOUS

PDF

35.2 KB Created: 2021-07-03 17:50:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 8ccd2d676d49f6ce6ad377b704844b4d SHA-1: e841649eac5919008ddab412a180792695417f80 SHA-256: 4cf65cb98273838ad29c0de9f8767d4b273ff463be85eea79a6635d056ed6031
220 Risk Score

Malware Insights

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

This PDF document employs a lure related to free game currency and hacks, directing users to external URLs. One URL points to known malicious redirector infrastructure, and another uses a raw IP address, indicating a high likelihood of malicious intent. The document also contains a heuristic for a password-protected archive lure, suggesting a multi-stage attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/431946152/free-robux-com-2021-game-hack In PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-invitation-template-free_GM431946152.pdfPDF link annotation
    • http://111.68.26.74/widyapustaka/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-free-dragon-ball-z-map_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-hack-roblox-accounts-2021-windows-10_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-cheats-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-free-bot-followers_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-a-free-knive-in-roblox-cbro_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-robux-hack-free-robux-generator-uirbx-club_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-muscle-shirt-free_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-ultimate-driving-money-cheat_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-hack-for-robuxs_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-sample-roblox-download_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-free-snacks-link_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_off0000322c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x322C 22196 bytes
SHA-256: 0c149fdacafc83970db8876a1b594e123271b1407fe4a780e99d7d8c055237fa
font_01_sfnt_off00006374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6374 19380 bytes
SHA-256: e4a3050f3e501d111e2505792e6fe17b213487e8f387ded0c09bd9d126917491

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