Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca48761c1e30f75…

MALICIOUS

PDF

43.4 KB Created: 2021-05-21 17:21:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 81616b18b86120deccb682ffc1d19f5a SHA-1: 840238e322a338352d7e83182c07f579275f1343 SHA-256: 0ca48761c1e30f75d1eacb3ad42b733b0fec87bd23c01edcf991c8367b0c7b19
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains, specifically advertising 'game hacks' and 'generators' to lure users. These links ultimately point to domains hosting further malicious PDFs or potentially other payloads. The ML classifier also flagged this PDF as malicious, increasing confidence in its harmful nature. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7947

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 https://netcdn.xyz/app/431946152/how-to-hack-roblox-games-game-hack In PDF document text
    • http://firesafetyservices.biz/images/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000342d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x342D 25016 bytes
SHA-256: 90d969d637a7c743198813fe8f24eff9eb1d05b9189d2dfb46856b802f66e5f0
font_01_sfnt_off00006d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6E 3964 bytes
SHA-256: f6b9a386ee4e0aff622a98b2230905da71eab0ca98398cb52018fda3528d3e2a
font_02_sfnt_off00007acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACC 3396 bytes
SHA-256: e59bc53cd4c0ee65dc1533becad2866f345dcb060e6c68bb8187d21cb9f973ee
font_03_sfnt_off000086bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86BF 18608 bytes
SHA-256: f0530f62cc2e234d68a11618bd0f649c02fcf1ebf2f14054a2e3aba439076e74