Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe875e40ea7c555…

MALICIOUS

PDF

34.6 KB Created: 2021-07-19 06:01:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f080090f53b008228d672048f6975b38 SHA-1: cb3f73af095815484ae63c18788bfd20eb6dff16 SHA-256: afe875e40ea7c5551f50b120f161ce90c98cf1b5e106a8fddc4468ad087e40bd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded URLs that redirect to malicious infrastructure, specifically advertising free game hacks and generators. The document body and extracted URLs suggest a lure designed to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the presence of malicious redirector links and the ML classifier's high confidence indicate a high likelihood of malicious intent, likely involving further payload delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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/406889139/free-spins-coin-master-unlimited-game-hack In PDF document text
    • https://my-private-intendant.com/images/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://my-private-intendant.com/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • https://my-private-intendant.com/images/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://my-private-intendant.com/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://my-private-intendant.com/images/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • https://my-private-intendant.com/images/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://my-private-intendant.com/images/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-free-spins-link-2021-today_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_off00003150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3150 22904 bytes
SHA-256: fc5c8f0c1e22ce3fd91b4c28cedcc8df78cc2da2b08600d35faac09eff1c5b38
font_01_sfnt_off0000649a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649A 18580 bytes
SHA-256: 8aad0f2405ec9a3272b05944b48a23572f7af0293916013bea6eee8874d320e7