Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0c33af7afcbf6e…

MALICIOUS

PDF

33.4 KB Created: 2021-07-21 08:51:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: aeb5d0dedb21071517e5b687099eaaa2 SHA-1: 861d3cf1940f2ba935e95a2769c0a728dd899818 SHA-256: 6e0c33af7afcbf6e252988678f6af5d21ac37d5aee775350ae8b5bf735e4eb2d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game currency or hacks. The primary link, http://netcdn.tw/app/431946152/free-robux-no-password-game-hack, is identified as a malicious redirector. The document body and embedded links reinforce this lure, aiming to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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-no-password-game-hack In PDF document text
    • https://infinityorthotics.ca/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://infinityorthotics.ca/wp-content/uploads/fsqm-files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://infinityorthotics.ca/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://infinityorthotics.ca/wp-content/uploads/fsqm-files/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://infinityorthotics.ca/wp-content/uploads/fsqm-files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://infinityorthotics.ca/wp-content/uploads/fsqm-files/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • https://infinityorthotics.ca/wp-content/uploads/fsqm-files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://infinityorthotics.ca/wp-content/uploads/fsqm-files/free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://infinityorthotics.ca/wp-content/uploads/fsqm-files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://infinityorthotics.ca/wp-content/uploads/fsqm-files/minecraft-java-edition-redeem-code-free-2021_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_off00002d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D6F 22324 bytes
SHA-256: efd7112f8f73fa617cd5873477cd4e5302898f41203ac8f4f88fc183c8ee4643
font_01_sfnt_off00005e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9C 18920 bytes
SHA-256: e32cd2d9ef9c7d65ca6dcb56925fdb086d69ea06ee0e8757ce45dcc04a676380