Malicious PDF — malware analysis report

Static analysis result for SHA-256 76acbfc5907751aa…

MALICIOUS

PDF

34.9 KB Created: 2021-06-25 03:15:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6e268a8131fbcf0dbd8946826eff9d89 SHA-1: 87da83a82821bc934373d3d3594548a8da4b280c SHA-256: 76acbfc5907751aa07cbdba770b60faab02a353c12515f34d6877554bb6c0f6d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free items. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links indicates a phishing or scam attempt. No scripts were extracted, but the document's content and embedded URLs suggest a lure for users to download potentially harmful content or visit malicious websites.

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/free-t-shirt-adidas-in-roblox-game-hack In PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/uribx-club-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/200-robux-free_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/roblox-hack-week-2021-2_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/free-robux-generator-2021-robux-hack-no-survey_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/como-hackear-la-cuenta-de-alguien-en-roblox_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/admin-roblox-free-admin-commands_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/free-robux-site-for-comuters_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/op-rewards-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/acuont-stealer-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/hacking-roblox-copyright_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/free-codes-royale-high-roblox_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/free-roblox-codes-that-give-you-robux_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/how-to-stop-a-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/free-robux-codes-november-2021_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.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_off0000314f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x314F 22308 bytes
SHA-256: 24249bd0aa0b6d1da6699966aa0b095561cf8c1289e7ba1b3418e8ec70f08e40
font_01_sfnt_off0000630a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630A 19216 bytes
SHA-256: 476ae2ef3f1b1d33172ec88fa37891127f23f51ed49368559a1dd7b268e75bbe