Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db59905517454ba…

MALICIOUS

PDF

45.9 KB Created: 2021-05-17 03:07:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5983fe27093d07db75a8dcb8d577e249 SHA-1: c3c77cf53766dc24a1b62f7787cdaf8f0db7b92e SHA-256: 9db59905517454ba94bbd347a091dbb136ce9b95b33b94c4c44f53271a63ef9d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising free Robux and game hacks. The document body and heuristics indicate a lure to click these links, which are flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for JavaScript execution or further redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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 https://netcdn.xyz/app/431946152/free-promo-codes-for-robux-game-hack In PDF document text
    • http://salon-vyshyvanka.com/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://salon-vyshyvanka.com/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://direct-link.netIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4950 25472 bytes
SHA-256: d2cc5a99eb397d27ca18a294b698c520a09140d1194e2829d325b3681c088a14
font_01_sfnt_off0000837c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x837C 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00009023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9023 18604 bytes
SHA-256: f71c03fba91376071fb946d88a6d16afcc2c6d61aa4ef632c3571b6200829f5d