Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e91dd78d490b33f…

MALICIOUS

PDF

50.6 KB Created: 2021-05-12 02:33:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8693fb905ebcd1974977306bb3dc2f10 SHA-1: 9f2e2f26c40c257573fb7517ce1de8bd249104da SHA-256: 4e91dd78d490b33ffff377cf57888328a7d14ce290e75cd9811f348c6dfd45e4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that are flagged as malicious redirectors, specifically promoting game hacks and generators. The document body and heuristic firings indicate a lure to click these links, which likely leads to a malicious download or phishing page. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9349

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.xyz/app/431946152/roblox-hack-site-game-hack In PDF document text
    • http://eooe.gr/images/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • http://eooe.gr/images/install-coin-master_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/corn-master_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/robux-in_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/how-do-i-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47CB 28120 bytes
SHA-256: c42f79eb26e7718d8ac8fdd02db88408b9a88577c26836e6f7a2b7dfb338a5f4
font_01_sfnt_off000087dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DC 8292 bytes
SHA-256: d9f4186b1f87f7666b1bf07fa486e929d445bfdb695ad9485c0d70f595f17a60
font_02_sfnt_off0000a31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA31C 18408 bytes
SHA-256: baa68e8b80fe17984eb0f5893287011db8c451c65a8bba41303beeb2aadfa952

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