Malicious PDF — malware analysis report

Static analysis result for SHA-256 592e979fd05bf476…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 21:57:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d1b136f9d7ae2558f06811748e8c36ba SHA-1: 7a742bc24fac3f0ee465bbf96c1b0b6b6b12b871 SHA-256: 592e979fd05bf4760a56ba3354b861cb1c46da64a12b8bcf49194af9d3671f4b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/479516143/free-minecraft-alt-accounts-game-hack. The document body and embedded links suggest a lure for free game hacks or generators, which is a common social engineering tactic. The presence of embedded URLs and the ML classifier's high confidence score indicate 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/479516143/free-minecraft-alt-accounts-game-hack In PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-you-get-robux_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-posed-golden-freddy-roblox_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-roblox-money_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/hack-the-plaza-roblox_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-robux-and-tix-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/tiktok-free-open_GM835599320.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/do-new-roblox-player-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/cheat-money-roblox-tycoon-fr_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-download-wall-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-2021-hacks-catalogo-free_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-hack-account-2021-free_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/minecraft-free-download-windows-10_GM479516143.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_off000035ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35EA 22440 bytes
SHA-256: f7c6978d1af96176a9f2cca62a9bf1913c746d68345c76d31fb9310c484c7e46
font_01_sfnt_off00006803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6803 18212 bytes
SHA-256: a587ad5d7ccc78e3894402c93b871667a6b3b423df15bdaf3724955d5b668927

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