Malicious PDF — malware analysis report

Static analysis result for SHA-256 a802e2020d8e4f07…

MALICIOUS

PDF

33.3 KB Created: 2021-06-27 21:02:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a48423c228b78fff4a9f767a2bda2cbc SHA-1: 4dc1c55d01665140086c0705006d65f48d74008b SHA-256: a802e2020d8e4f07077f8907ea8ead2ce308e8490e2c09f2ba521c9ee0b26797
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or generators. The ML classifier strongly indicated maliciousness, and the presence of numerous redirector links confirms a phishing or scam attempt. No scripts were extracted, but the document body and heuristics point to a lure designed to trick users into visiting 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.co/app/431946152/hack-tutorial-xb-roblox-game-hack In PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-games-at-roblox-com-htm_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-change-your-name-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-mouse-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-marshmallow-head-in-roblox-2021-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-do-you-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-do-you-get-free-robux-instinly_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-hack-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-hack-iosgods_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/play-roblox-for-free-online-now_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/pubg-300-uc-trick_GM1330123889.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_off00002c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C85 22092 bytes
SHA-256: fcebb13cf49e7935c87cb87700dc7d024ef8145293fbe306bca0552e81399e01
font_01_sfnt_off00005d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D22 19020 bytes
SHA-256: 70d0017fdeaa85aaf519a510e09a56e3b1fdf147ce3782f7f9066bf2532e7655