Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b7659d5e3f841ce…

MALICIOUS

PDF

37.0 KB Created: 2021-06-28 19:11:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1d91b6fd9ffe54fa93a746b49b2a4a7b SHA-1: bb2e8eec09fe64ee20b6f57e742eca3e07c7d18b SHA-256: 8b7659d5e3f841cee80a2b51cb259a7be6cc78718c0e30c6c23b2471c6099192
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures. The document body, though partially corrupted, also contains similar promotional text and URLs. This indicates a phishing or scam attempt designed to redirect users to potentially harmful content.

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-bypass-survey-game-hack In PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/free-roblox-generator_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/how-to-get-any-item-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/roblox-logo-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/worst-client_GM479516143.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/cheat-buddy-roblox-aimbot_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3648 23204 bytes
SHA-256: 12ce98ce56f41d7ba6ccca39ad24a72366b4f9ae993ad0c9e04725ebcb78993f
font_01_sfnt_off00006a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A57 19452 bytes
SHA-256: 35fae657d86fa2aa6307662e9adac70a093c15bc7d23795e85b82d1a6165d9b1

Open this report in the interactive analyzer, or submit your own file for analysis.