Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58a08f975062367…

MALICIOUS

PDF

32.1 KB Created: 2021-07-20 03:22:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e858edf088f758a7352d99f4951b1f66 SHA-1: 1bf12ec68470adf6041ca7c4ad8bdeca5eac6a01 SHA-256: e58a08f975062367f67044834a12a565479a7f4e123b887969a47fe7048a7ceb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links to known malicious redirectors, specifically advertising 'free generators' for games like TikTok and Roblox. The document body and embedded URLs indicate a lure to download or access these 'generators', which are likely malicious payloads or further phishing pages. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/835599320/freer-tiktok-game-hack In PDF document text
    • https://gimnaziya6.kz/images/free-robux-co_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://gimnaziya6.kz/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • https://gimnaziya6.kz/images/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://gimnaziya6.kz/images/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-robux-no-human-verification-or-survey-or-download_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_off00002bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB5 22416 bytes
SHA-256: 45c40c7935c9a7587517e4da426c86febde62a0cfdeaeba7add7178f62601d34
font_01_sfnt_off00005df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF0 17456 bytes
SHA-256: eee1edbfcd64309e57980115a02bab568c84f21b085b7ef169a7723337a1b17d