Malicious PDF — malware analysis report

Static analysis result for SHA-256 6572a9f236c7bf54…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 21:57:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 82cef93eefa494901b871db96da6c0c4 SHA-1: 6a2be9caea2d299006135479c3b8d5cf3d8fc564 SHA-256: 6572a9f236c7bf54ec6518b46cfdc9d7e11de35b7e3c65e4fbd7ebc0f1261810
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, masquerading as generators for free game currency or hacks. The heuristic firings indicate that the PDF is designed to lure users into clicking these links, which likely leads to further malicious activity such as malware downloads or phishing. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/431946152/free-robux-promo-codes-2021-game-hack In PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-exploit-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/android-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/maverick-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-how-to-noclip-cheat-engine-feb-2021-mac-apple_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-hack-someone-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-jailbreak-speed-hack-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-cheat-engine-no-download_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/apps-to-get-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-game-where-you-hack-computers_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-10-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/best-girl-outfits-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/gat-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/xyz-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-cbro-free-cases_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-hack-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/noob-skin-roblox-free_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
stream_002_off00002efa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EFA 22944 bytes
SHA-256: 9c1b504dcd7d61c33e330fa56955ad41eb0da3e4a0b7206159cb0848844ef52a
font_01_sfnt_off000062ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CE 19708 bytes
SHA-256: 4ffa5120539f8d9e821cc62be6a3cc920cc67344a1ea2f390d2f58e18d351055

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