Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7fe531fc41451ce…

MALICIOUS

PDF

37.3 KB Created: 2021-07-03 23:46:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7a400e204e03655c83ba06403dfc4e5f SHA-1: 7b723fd49a1e5f8261e0890fbdc1fec9724010e4 SHA-256: e7fe531fc41451ce5378af5e88816bdc337e86451f14b2c0072ae8b70383f80c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free spins, redirecting users to a known malicious infrastructure. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and the nature of the links indicate a high likelihood of malicious intent, potentially leading to further compromise.

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/haktuts-coin-master-free-spins-2021-game-hack In PDF document text
    • http://library.acehresearch.org/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-roblox-t-shitt_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-money-in-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-hack-roblox-aimbot_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-with-codes_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-find-roblox-in-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-code-21-01-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/new-free-robux-roblox-promocode-gives-50m_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-roblox-accounts-pastebin_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/tiktok-vs-free-fire_GM835599320.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/filtering-enabled-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/ways-to-get-free-robux-2021_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
font_00_sfnt_off0000380b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x380B 23720 bytes
SHA-256: 827a509497f6fbaeeb5ab6461cf3166c26332fda443eaf5c5caee81d07582b78
font_01_sfnt_off00006dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAC 18884 bytes
SHA-256: 419a54345942d61df1c2508925993529a2deda544c7f32f326dbec5b819008ad

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