Malicious PDF — malware analysis report

Static analysis result for SHA-256 269bf059ff381116…

MALICIOUS

PDF

34.2 KB Created: 2021-06-19 05:22:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 88ef0aa98c49144a2e388903da456a80 SHA-1: 39da265c1e2a92ba3ace5c806a948c90e2c2f37b SHA-256: 269bf059ff3811166a48675b353d1ede0c6fa620070af3836e33e0e6a0c3daf2
200 Risk Score

Malware Insights

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

This PDF document is designed as a lure, presenting itself as a 'free generator' or 'game hack' to entice users to click on embedded links. The primary link, http://netcdn.co/app/431946152/does-the-roblox-hack-work-game-hack, is identified as a malicious redirector. The document also employs an MFA lure, suggesting an attempt to harvest session tokens or abuse multi-factor authentication. While no scripts were explicitly extracted, the nature of the lure and the embedded links indicate a high likelihood of further malicious activity, such as downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/does-the-roblox-hack-work-game-hack In PDF document text
    • https://duoledesign.com/image/data/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/how-to-use-mega-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/spins-coin-master_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-admin-roblox_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/gain-robux_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/cone-master_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/roblox-free-robux-generator_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_off00002f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F66 22192 bytes
SHA-256: a413f8c3952f697eceabb284d3b842f53876e7d9aab486a08180f94699db79e6
font_01_sfnt_off00006007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6007 19188 bytes
SHA-256: cb52ee0a3fa0bb5bb4ffbe5478ac44f559492f8f556367ea0c956cd60aa6030e

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