Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0b647d40946bac…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 10:51:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c8ed3a51e5e54d3e40a7bedec26dac17 SHA-1: c1952b0f5d07f9bed9028cd4c112578a3ace8b02 SHA-256: 3f0b647d40946baceb8851e8dd0ecad291775a4c05e1ff5b41763a4616f42b0f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one that redirects to malicious infrastructure associated with 'free Robux' and game hacks. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to click these links, likely leading to further malware downloads or phishing attempts.

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.tw/app/431946152/free-robux-survey-game-hack In PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/how-to-hack-roblox-pokemon-universe_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/rs-free-robux_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/https-pastebin-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/how-to-use-cheat-engine-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/follow-people-inyo-roblox-games-hack_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/hacked-roblox-app-ios_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/how-to-get-free-robux-inspect-element-no-wait_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://www.biotrade.com.au/uploaded_files/userfiles/files/robloxwin-com-earn-free-robux_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_off00002fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD7 22120 bytes
SHA-256: 9e5c6524282aba5f908e3b3dd52a9265b694fd84ea3207124cb71edf66a4874a
font_01_sfnt_off0000609e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609E 19012 bytes
SHA-256: c0541a5d6200ab17734b4952abc6c0a8b533a715d99044a6ee13c1a52db76e39

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