Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8625ccffaca8d6…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 19:38:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7df4d263d07e97992eee6187657b19c1 SHA-1: 70119c852fd9ee0eb15f12601c3116524fe9c141 SHA-256: 9e8625ccffaca8d622bdd960d8270b64235a33472ea11b0a19e5196e6f2199e4
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free Robux and game hacks to trick users into clicking malicious links. The document contains multiple embedded URLs, including a known malicious redirector, that point to further malicious PDF files hosted on an IP address. The primary goal appears to be directing users to potentially harmful content through a chain of redirects and malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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-without-human-verification-2021-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/access-here-https-roblox-jailbreak-hack_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/jailbreak-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/mcpe-116_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/xydia-roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/auto-clicker-download-roblox-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-hack-2021-admin-codes_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/admin-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-lvl-dragon-ball-final-stand-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/cheat-engine-hack-roblox-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-roblox-accounts-2021-with-robux-august_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_off00002fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAD 22184 bytes
SHA-256: 6d45c90e69d77fb0f636f55012047f5ee8a49be9f055dafaa42696cd07673fb0
font_01_sfnt_off000060b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B5 20100 bytes
SHA-256: 224766b145fea2ee77d6018406834ac88e8b97acd6b6511a2b41135dc58ea70f

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