Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df1f44578c1c0c9…

MALICIOUS

PDF

34.7 KB Created: 2021-06-29 10:39:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7a1cd895a330c02cbee71922fa615c24 SHA-1: c782e1099ef9096dc09f9400cb341bea1315757e SHA-256: 9df1f44578c1c0c9209c138b962e7dd38c7431176cc967596c7cf4ff36fa1452
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to redirectors and pages offering game hacks and free currency, indicating a phishing or scam attempt. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of numerous related URLs strongly suggest this malicious intent. While no scripts were directly extracted, the document's structure and embedded links are designed to exploit user interest in free in-game items, likely leading to malicious websites or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/roblox-free-t-shirt-2021-game-hack In PDF document text
    • https://tena-g.hr/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/roblox-system_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/ss-hub-free-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/free-gamepasses-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/roblox-robux_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-get-anything-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/robux-claimer_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/descargar-programa-para-hackear-roblox_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_off00002f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2F 22528 bytes
SHA-256: 35c3e2e7c76e87cc8f8143f8bb1542d0004b75b2ed9b514715318f768249f323
font_01_sfnt_off0000618f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618F 19444 bytes
SHA-256: c66a94cd720a6e50032c61454f96dab09e6e06f534eb780f194378a72c82c974

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