Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4470f07bda0801…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 01:24:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: de265d8f276eb2cbe00f75865a655909 SHA-1: a00bb53af6817021573c6ff05a1f482c9afb30f1 SHA-256: 8e4470f07bda0801656fa3fbf07db79e3c32cba4d1c4be9249c62216a7e33688
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures. The document body and heuristics confirm the intent is to trick users into visiting these malicious sites, likely as part of a phishing or scam campaign. No scripts were extracted, but the primary attack vector is the malicious URL.

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/431946152/free-roblox-accounts-with-robux-2021-game-hack In PDF document text
    • http://lib.uho.ac.id/library/repository/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/pokemon-go-kanto-tour-free-version_GM1094591345.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/krnl-download_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-hacks-w_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/hacked-by-john-doe-roblox-prank_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-radio-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spins-coin-master-2021-no-verification_GM406889139.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_off00002e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E35 22388 bytes
SHA-256: 5e5ed86ef0d05f23ee166c43fb9c26d1169147f04a079c96fe2177c503701982
font_01_sfnt_off00005ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF4 19780 bytes
SHA-256: 25192f6a53e08aa9ffc26a88a4bc642b185baba041384cccd6a0910bb22c1d67