Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa348879a422c9d…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 17:38:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cd062d95e51b811d550f5ba65ee11ab4 SHA-1: 2051d695aa13a335f708f2dda441bb9f8e837fd5 SHA-256: 4fa348879a422c9dc08b67cd8bc11d67c0d44ce43aed6e78668bf9c89e2d2734
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a known malicious redirector at http://netcdn.tw/app/479516143/mc-update-game-hack, which is presented as a 'free generator / game hack'. This lure, combined with the ML classifier's high confidence, indicates a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for JavaScript execution or further redirection to malicious sites.

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/mc-update-game-hack In PDF document text
    • http://elibrary.fl.unud.ac.id/repository/cheat-codes-roblox-mad-city-money_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/robux-hack-2021-without-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-roblox-outfits-for-boys_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-hack-roblox-to-get-free-builders-club_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-account-selling-free_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-counter-blox-roblox-offensive-free-skins_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-get-free-robux-no-verification-on-computer_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-scrip-super-poderes-no-hacks_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-bunny-jump-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-my-hero-academia-online-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/rise-of-nations-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/hack-all-games-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/roblox-mad-city-geld-hack_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_off00003236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3236 22420 bytes
SHA-256: 44f9b1d8bd86670190faa2c4ffdfbc3fc619d850a9d370c2421490130c67dd47
font_01_sfnt_off000063c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C3 18272 bytes
SHA-256: 82dc0b43539ef2d7bbb3eb626da65d3f7def0b72e0a32f2638731d13eaa39649

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