Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda0ad68a7b2744b…

MALICIOUS

PDF

33.8 KB Created: 2021-07-21 18:23:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3ac863d813289538d775451dba10058f SHA-1: 659f444a7363baf22f08e52ad4fd36a10f96aa57 SHA-256: bda0ad68a7b2744b52d870f3c76604a5ae87685e0105c92a7abaf35c113fc331
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, masquerading as a 'free generator' or 'game hack' lure. The document body and embedded URLs reinforce this social engineering tactic by promising free in-game currency or downloads. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a potential for JavaScript execution or further redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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-without-verification-game-hack In PDF document text
    • https://ths-academy.net/wp-content/uploads/fsqm-files/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://ths-academy.net/wp-content/uploads/fsqm-files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • https://ths-academy.net/wp-content/uploads/fsqm-files/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • https://ths-academy.net/wp-content/uploads/fsqm-files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • https://ths-academy.net/wp-content/uploads/fsqm-files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-tiktok-views_GM835599320.pdfIn PDF document text
    • https://ths-academy.net/wp-content/uploads/fsqm-files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://ths-academy.net/wp-content/uploads/fsqm-files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ths-academy.net/wp-content/uploads/fsqm-files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://ths-academy.net/wp-content/uploads/fsqm-files/how-to-get-free-tiktok-likes_GM835599320.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_off00002bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BF3 22900 bytes
SHA-256: 7e48129e22dd67739109e5fe7e11a6a70e3669b3a6141ae7cb63d0bbf7c67e0d
font_01_sfnt_off00005f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5C 19152 bytes
SHA-256: 7895b126dfac826061eb5c6a40f44fc83c5a70e85f9762b018221c4de09f25d7