Malicious PDF — malware analysis report

Static analysis result for SHA-256 125c3b21b6363031…

MALICIOUS

PDF

32.9 KB Created: 2021-07-06 06:11:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 04cadfbf3f4634aaa80b195e30745b46 SHA-1: c86915168df2b6313b9ae6385c6df1708488adab SHA-256: 125c3b21b636303111a61d2cb82f317fa5a303f7ac1bf8b43323aa846fefe21a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or exploits. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/431946152/roblox-april-fools-hack-game-hack In PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-roblox-hack-no-survey-no-human-verification-update_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-jailbreak-roblox-noclip_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-hack-no-human-verify-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-admin-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/2021-bt-hack-for-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/game-empire-tycoon-roblox-hack-script_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-troll-players-script-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hack-commands-and-lua-c_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/infinite-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-account-giveaway-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-roblox-groups-with-funds_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_off00002a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A98 22240 bytes
SHA-256: 0efba75c903997674b1b1db50c567c5fb0c657562b661fc4cf2464dcb7a849a9
font_01_sfnt_off00005bda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDA 19116 bytes
SHA-256: 957a6bf5bd2c1b396ff8ef3f5dcaebf30264b35c98f1aeb878ab2774c8dd316e

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