Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d452f5faf788b1…

MALICIOUS

PDF

36.1 KB Created: 2021-06-24 09:54:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d6a0deb7655b6047009fd142aae0542d SHA-1: 2630ce1b5faade7bd8a2eed25280c3285069dc52 SHA-256: d3d452f5faf788b14701af7a8f5a77a929f739865266049649602d43a80bf05b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as generators for free game currency and cheats. The document body and embedded URLs strongly suggest a lure for users seeking in-game advantages, which is a common tactic for distributing malware or leading to phishing sites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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/free-robux-just-enter-username-and-password-game-hack In PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/hacks-for-dragon-ball-burst-roblox_GM431946152.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/free-tiktok-followers-no-human-verification-2021_GM835599320.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/minecraft-114-download_GM479516143.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/roblox-free-hats_GM431946152.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/free-admin-roblox_GM431946152.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/free-roblox-intros_GM431946152.pdfIn PDF document text
    • https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33DB 22508 bytes
SHA-256: d4cb9c96e37b839f49d7bc51c3cdaa95f8d5915251a7bef92191190635cb637f
font_01_sfnt_off00006643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6643 19740 bytes
SHA-256: ca0dd26b0bef75d2603dd700b03ccf5a3b1662ca9f727b40bb5c9350a3d5659a

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