Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0d3fc1c1978a3b…

MALICIOUS

PDF

36.3 KB Created: 2021-06-29 10:42:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c1f556d738a2b347a906c922d660f65d SHA-1: c0c0fa1ea4e38afdb87bfe708e4515cdfcc48be3 SHA-256: 5d0d3fc1c1978a3bd0e5353a3023d66347a1d700ac274b6163eca0edb11e7e4a
160 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks and free generators to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. No scripts were extracted from this sample, but the presence of malicious links and the ML classifier's high confidence score indicate a high likelihood of a malicious workflow.

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.co/app/431946152/how-to-hack-roblox-accounts-mac-game-hack In PDF document text
    • http://fobh.net/userfiles/files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/cheat-coded-roblox-minning_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-printable-roblox-birthday-banner_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-hack-a-roblox-accout_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-emergency-response-liberty-county-hack-script_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-pro-hack_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3409 23104 bytes
SHA-256: 25368405ae2396bfc557599d1d137e5ef5c19495bea71f5d7b8ac361ec76ef6c
font_01_sfnt_off00006845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6845 19260 bytes
SHA-256: 32eacf9f7ff2cd4d0618cd110056d2a97269cb0cb260576819c2f71c796adc46

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