Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f14fc81af14ec78…

MALICIOUS

PDF

35.3 KB Created: 2021-06-27 10:25:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fd274ada9e272cfd3e401475b2f22e31 SHA-1: 6b2fdb11290b44d91796c3df9cd7702f9490b465 SHA-256: 9f14fc81af14ec78b4b77588f3fe0e6bb33135f51b7243a5cf746afd402f5e37
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to a malicious domain, likely serving as a lure for game-related cheats or hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links indicates a phishing or malware distribution attempt. No scripts were extracted, but the document's structure and embedded URLs suggest an intent to trick the user into visiting a harmful site.

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/roblox-gaben-hack-game-hack In PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/redeem-card-2021-robux-free_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-admin-no-download-roblox_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-imagine_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-get-free-robux-from-groups_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/caillou-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-geld-hack-deutsch_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/easy-way-to-get-free-robux_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_off0000310f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310F 23800 bytes
SHA-256: 5de3a42fd88418f2b3179c5598c238cc7161157d383df27869d95b5d87eb5a99
font_01_sfnt_off000065f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F9 18656 bytes
SHA-256: 133a20849c56cc8b79a68f05a65641aec72704b49c6f5ef3376828aee8c5dc55

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