Malicious PDF — malware analysis report

Static analysis result for SHA-256 2312c7d565dac2bc…

MALICIOUS

PDF

35.3 KB Created: 2021-06-27 14:12:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d561990c660dc5b743d7d922d7992590 SHA-1: 34952d03d51674120415db654a20475b14649139 SHA-256: 2312c7d565dac2bce14f2f87e4ef312819bd0b2e12dc787579c92e18340a5a50
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and a call-to-action phrase designed to trick users into visiting a redirector URL. This redirector is associated with known malicious infrastructure and lures users with promises of free game currency or hacks. The document body and heuristics indicate a phishing attempt disguised as a giveaway.

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/free-robux-card-2021-game-hack In PDF document text
    • http://safari-crimea.com/images/free-groups-to-be-claimed-roblox_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/youtube-how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/how-to-get-free-tattos-in-roblox_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/roblox-jailbrek-fly-cheat-engine-33dc_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://safari-crimea.com/images/free-stuff-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/free-roblox-card-pastebin_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/how-to-hack-roblox-with-cheat-engine-mac_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://safari-crimea.com/images/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/how-to-hack-a-account-with-btools-on-roblox_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/hack-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_off000032c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C7 22236 bytes
SHA-256: 1cc0b76f91e4d0ea38815985b26c8917e54a2a558d9a79bb93ee1d32af0b6f1f
font_01_sfnt_off0000642d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642D 19292 bytes
SHA-256: 0f7a4f975aa48cfb49e982946cdc83006473f56493ef503b16ac10632378e3b7

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