Malicious PDF — malware analysis report

Static analysis result for SHA-256 e61e7c29696d6493…

MALICIOUS

PDF

34.5 KB Created: 2021-06-29 21:58:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 03ba188b62c6c79860a36b19b56554bc SHA-1: 395d7fee396ccad5018de2614a07c7e12613b715 SHA-256: e61e7c29696d64938952e763854373c65c8d2da9ef0cba88ddd37dded686977f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector infrastructure, specifically advertising free game hacks and in-game currency for popular games like Roblox. The document body and heuristics indicate a lure designed to trick users into visiting the malicious URL, likely to download further malware or engage in other malicious activities. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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/test-all-free-roblox-gear-free-admin-hacking-scripts-game-hack In PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-auto-redeem_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-shirt-and-pants-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-hack-scripts-admin_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/best-free-gun-models-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-homepage_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-roblox-6-pack_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-exclusive-virtual-item-codes-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-for-watching-ads_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-roblox-accounts-with-robux-and-bc_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-tycoon-games-free_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-100-robux-on-roblox-free-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_off00002e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E3E 22424 bytes
SHA-256: c25b5c66fe01614a73c84b5d112ecf7b09168ac6f4e040f4c14fd93eb15db376
font_01_sfnt_off00006035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6035 19656 bytes
SHA-256: f70965693e9b799c2cbde992318769d2c5e79f242c2fd41d3c38985bf157a206

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