Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b958ca5f7ea5f41…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 05:13:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3f127bfdfe6dbf0e9aee56ee2475d517 SHA-1: 830406d27fdfc94935c21dbc76d02d029e0d93f7 SHA-256: 8b958ca5f7ea5f41d5fa7cd85525602e68ba73aaf5354376ba866ac049c73496
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The primary lure appears to be a 'Coin Master Hack' which leads to a known malicious redirector. While no scripts were extracted, the document's structure and embedded URLs strongly indicate a phishing or scam attempt designed to lead users to potentially harmful 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.tw/app/406889139/coin-master-hack-lost-world-2021-game-hack In PDF document text
    • http://lib.fisipumt.ac.id//repository/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-swear-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-pet-simulator-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-on-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/cheat-pour-phantom-force-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/wewgaming-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/im-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-free-champion-shirt_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-codes-2021-not-expired_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/veorra-set-free-roblox-id_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-pastebin_GM431946152.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
stream_002_off00002e63.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E63 22528 bytes
SHA-256: 26b268ba991340e6743d0af3123f2f85cfe5935a3cc234f05181c992e7de0fdb
font_01_sfnt_off0000608b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608B 18852 bytes
SHA-256: 2669d3b3f6f7768ec93435b0c17e3258224bc91c1821838396bd24ebd9fbfedb

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