Malicious PDF — malware analysis report

Static analysis result for SHA-256 3508c3db7a538d1d…

MALICIOUS

PDF

34.6 KB Created: 2021-06-18 04:20:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 50044244df98c82f34e680123daf86ff SHA-1: 28f2dbae05605d76be2e6af1e0e50294cc462504 SHA-256: 3508c3db7a538d1db771ca23b8120304ecca919b8b8e5bd31b87499a980d2b1a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a primary link identified as a malicious redirector. The document body and heuristic firings indicate a lure for 'free game hacks' or virtual currency, suggesting a phishing or scam attempt. The embedded URLs likely lead to further malicious content or exploit kits.

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/how-to-get-free-robux-on-roblox-without-paying-game-hack In PDF document text
    • https://www.armera.co.uk/uploads/files/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/roblox-vehicle-simulator-shakedown-hack-glitch_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/hack-para-cs-go-roblox_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/pubg-uc-hack-online_GM1330123889.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-asault-rifle-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://www.armera.co.uk/uploads/files/files/flip-master-free-coins_GM406889139.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_off00002f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5E 22120 bytes
SHA-256: 70de2b5c8c6b12e3866c1c4641561a4833ce62580df46fe0cad026839e92ca91
font_01_sfnt_off00006064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6064 19688 bytes
SHA-256: 57e501ae0124651ca8a23395e1b3bc8785021e42f3c77fbdcfbd82cb39a01813