Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35a27a6792f0ec0…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 13:52:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: dcf04dda6e7b4a604937786eaba3a963 SHA-1: c8b5e6c6551bf518dce4ace0c50c4e253c201728 SHA-256: c35a27a6792f0ec07773e6ee50f1bd8a95685ba48b27e55fd7644a4aba9b0e7c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting game hacks and free currency generators. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-free-spins-link-no-verification-code-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt designed to lead users to potentially malicious content or 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/coin-master-free-spins-link-no-verification-code-game-hack In PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-earn-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/ninja-assassin-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-hunter-x-hunter-lvl-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-roblox-multiple-game-openers_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/hack-roblox-lumber-tycoon-2-fly_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-roblox-accounts-2021-real_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/need-free-spins-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
font_00_sfnt_off00003095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3095 23272 bytes
SHA-256: 07da128c0c756972ad18fc63bd6b8ca5b291da32e7ca40d5343a2224ebea4c44
font_01_sfnt_off0000651d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651D 18652 bytes
SHA-256: bdc37e9fdb84c7f9bd1cdc58a73cd6cb90efc8d1c52484062942e7f2cec54e2f

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