Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1df227562a0648…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 06:55:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 53f6802b9d00f7c233e306b0bc5fb4e5 SHA-1: 5572daf47550c2c3b83f0dcd15df1d6c9410cde9 SHA-256: aa1df227562a0648968966c2c80e7ea5b1ab56d401a013c9bce09ecb5dfd9814
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generator / game hack' content. The primary lure URL is http://netcdn.tw/app/431946152/hacked-roblox-accounts-list-game-hack. This pattern is consistent with phishing or scam campaigns designed to trick users into visiting malicious sites, potentially for credential harvesting or malware delivery.

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/hacked-roblox-accounts-list-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-username-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/dragon-ball-rage-roblox-hack-script_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-rape_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-project-jojo-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/v3rm-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-accounts-with-bc-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-fly-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/download-roblox-free-on-mac_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-dday-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/breaking-point-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-and-catalog_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-hack-roblox-money-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-roblox-free-hack_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_off00002e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6C 22616 bytes
SHA-256: fd0d71c14fd5777decdfd1cf65af6c88bdedcfebff44adf01a60fc74abf7acc7
font_01_sfnt_off0000610b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x610B 19196 bytes
SHA-256: 381610bbab0b7b31e380a7a4918c50b3e30c1fbe9436aeae15edec1864da4a24

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