Malicious PDF — malware analysis report

Static analysis result for SHA-256 d321540d5c87e85c…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 10:18:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 29316833fd57de4135c9fb2e17c55a26 SHA-1: b13e9f8a05835b407ccf866409c03abfc2d5ca9f SHA-256: d321540d5c87e85caf40339a4b83290bfdf465283e3991825d7b016c055a8cfb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically targeting users interested in game hacks and currency generators. The ML classifier strongly indicated maliciousness, and the heuristics confirm the use of redirector links for a lure. No scripts were extracted, but the document's structure and embedded URLs suggest 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.co/app/431946152/hack-robux-game-hack In PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-free-cash-in-bee-swarm-imulator-roblox_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-hack-john-does-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-stuf-in-robux-calgot_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-hack-builders-club_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/de-roblox-hack_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-unlimited-robux-ad_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/new-code-hack-speed-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-just-enter-username-and-password_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_off00003115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3115 21936 bytes
SHA-256: bd9069d552510d4842b730a39384ec8204031b08bdf4637772a72e8d986939cd
font_01_sfnt_off00006178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6178 18724 bytes
SHA-256: 3ac7be5af293af38fa349e44a35dc9d744ccac9489df6a6de684f68f531fa54d

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