Malicious PDF — malware analysis report

Static analysis result for SHA-256 8971fc45422f33d3…

MALICIOUS

PDF

36.0 KB Created: 2021-07-05 09:46:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cdd0dc58bee1028aa17d5fb79fc52635 SHA-1: d761609e33ed0aecc1c66c97e1e66a34c47f85e0 SHA-256: 8971fc45422f33d3934ac508db6e11c413d7c3a2529819795867403dbb7f8978
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector infrastructure, specifically advertising game hacks and free currency for popular games. The primary lure appears to be a "free generator" for Roblox, directing users to the URL http://netcdn.tw/app/431946152/breaking-point-roblox-hacks-game-hack. The presence of numerous similar links suggests a campaign to drive traffic to potentially malicious sites that may host further malware or phishing content.

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/breaking-point-roblox-hacks-game-hack In PDF document text
    • http://digilib.stimlog.ac.id/repository/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-group-uniform_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-hats-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/foxyhackscom-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/do-you-get-banned-for-hacking-in-vip-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hacker-kolorowanki-do-druku_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/get-robux-com_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/schnellster-roblox-robux-hack-code_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-group-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-infinite-health-in-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hack-bars-2021-pc_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coinmaster-blogspot_GM406889139.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_off000033d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33D3 23232 bytes
SHA-256: f3cb7cb5e4b3ad8a0207460352f8ea2d0f17335dd1be9667dbc87c7b09860e60
font_01_sfnt_off000067d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D3 19032 bytes
SHA-256: 0664928b82d1a3a29aef3397c3eb6383bfd74fc0b2216dd211ecb29376287184

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