Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa546c5f654741d3…

MALICIOUS

PDF

34.0 KB Created: 2021-07-09 09:21:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 62a903a3d85fbafec8cfd462f392b5a5 SHA-1: dbe4e603e1d892fc814a80cac58ce5c32ffc4aa0 SHA-256: fa546c5f654741d364c2d3d4fac5902ab4a1a47ed762c44e23fcb734559425f4
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 promises of free in-game currency or hacks for popular games. The document body explicitly contains a call to action to access a Coin Master generator. The presence of multiple links to potentially malicious infrastructure and the deceptive content strongly indicate a phishing or scam attempt.

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-and-coins-daily-game-hack In PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-robux-live-stream_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-site_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-ohne-handynummer-und-menschliche-ver_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/malilokawaii-hack-de-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/http-pokecoinsco-robloxhackfreerobuxrobuxgenerator_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-morph-gui-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-gets-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-clothes-on-in-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/robux-for-kids_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_off00002f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1F 22296 bytes
SHA-256: e5ad9fc08f11e1a72da2f38b7e84c6866070210cabd7ff01535d3fdf12623679
font_01_sfnt_off000060b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B6 18772 bytes
SHA-256: 19a32b246d97102996ae87c3480bab741072fa74bbecf67b9c68c4bb2203f36d

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