Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e773fb2c026533d…

MALICIOUS

PDF

43.4 KB Created: 2021-06-04 04:46:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 572524d2956ecebaec9e14c9d06b503a SHA-1: 0a1350044ef3cf818c5bd5436b32a6e3663f35c4 SHA-256: 5e773fb2c026533dd2969ad07e7f9ce1319988c38d24f2ab98ca4abc1ee86c13
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with 'free generator' or 'game hack' content. The embedded URLs suggest a phishing or malware distribution attempt, likely aiming to trick users into downloading further malicious content or visiting scam sites. No scripts were extracted, but the document structure and embedded URLs strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/free-spins-coin-master-twitter-game-hack In PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-spins_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-without-human-verification-india_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-online-generator-for-coin-master_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
stream_004_off00004ee2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EE2 24668 bytes
SHA-256: c05aea4833e12b481bb4236275a9c379f4a43660d3f5e1db7b1aeb91bf7d57d8
font_01_sfnt_off00008785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8785 18052 bytes
SHA-256: 5c5bde080003b018f52b29448b55f3777b7529d6df28947afda157fb7b185cd7

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