Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de3aa7663492f61…

MALICIOUS

PDF

34.5 KB Created: 2021-06-27 19:22:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 340f45c28f2639b12e078f62d7fd12d7 SHA-1: 25c357b5de1dd19172aca39e2bbb85ac1b082425 SHA-256: 9de3aa7663492f6189e2de56c78ee4b75bc78b312181201160f6c2b7a6fa8718
200 Risk Score

Malware Insights

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

This PDF document employs a lure of free game currency and hacks to entice users. It contains multiple invisible links and visible calls-to-action that redirect to malicious websites, including known redirector infrastructure. The primary goal appears to be driving traffic to potentially malicious content or phishing pages.

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.
  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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/ho-to-get-free-robux-in-roblox-on-the-pc-game-hack In PDF document text
    • https://loba.com.vn/public/upload/files/cheat-code-money-for-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/hack-for-robux-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-no-offers-no-human-verification_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-giftcard-wix_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-hack-pro_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/nike-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-free-neck-accessories_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-captcha_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-page-no-human-verifaction-no-surves-no-email_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-coins_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-roblox-code-in-muder-mystery-2_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-the-scary-elevator-red-keys-locations-cheat-sheet_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-codes-to-get-free-items_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-free-items-site_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_off0000307a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307A 22128 bytes
SHA-256: a3574372957bc956706f0fca604cd128b51859a283ff3536e06af538a9535372
font_01_sfnt_off00006176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6176 19216 bytes
SHA-256: 05c013d86a73641a9422a8e13ab1370d42be8a5ce1d4d490c1076da9ff1885ac