Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd457ea256c191e8…

MALICIOUS

PDF

33.3 KB Created: 2021-07-03 23:16:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a35c60ce0d6e439c61c748c38ba31712 SHA-1: 353990804a7ef8ca2db587c3c350867741dd29e5 SHA-256: cd457ea256c191e89d2c8febcabe98eca306c5b28d85d95fb6d91ced56fe066a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirectors and potentially malicious domains, masquerading as game hacks or free generators. The primary lure URL is http://netcdn.tw/app/479516143/is-minecraft-free-on-ps4-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to malicious websites, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/479516143/is-minecraft-free-on-ps4-game-hack In PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/where-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-hack-generator-club-no-survey_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/group-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/stella-download-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/hacks-roblox-jailbreak-descargar_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/hacking-roblox-thumbnail_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/dj-khaled-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-get-free-robux-2021-may_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-garbage-simulator-script-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/rbx-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/roblox-free-sword-fight-game-templates_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-get-free-robux-no-verification_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_off0000316d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316D 21464 bytes
SHA-256: a6477c6c144ee30060804ce741524ad64583ae659150bf986fd448efbc2f41f5
font_01_sfnt_off0000600b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600B 18072 bytes
SHA-256: 7f567a84a7e198bcdc49c7aa6551e689257849d03792405e9cf70b2ffc94edbd

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