Malicious PDF — malware analysis report

Static analysis result for SHA-256 40225a4e602c596f…

MALICIOUS

PDF

36.4 KB Created: 2021-07-03 15:12:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7a5096679724e14a1f90847bd5de3baf SHA-1: 0b5a9229bdfb236e49987fba0d3c8090d8df4810 SHA-256: 40225a4e602c596f399862621cf7105cdd39208b77e3d4834dcbd1a1998c798d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary link, http://netcdn.tw/app/431946152/free-roblox-accounts-with-robux-that-work-not-banned-game-hack, is identified as a malicious redirector. The document body and heuristics confirm a lure for game-related cheats, indicating a phishing or scam attempt.

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-roblox-accounts-with-robux-that-work-not-banned-game-hack In PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/roblox-rb-world-2-hack_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/free-roblox-generator-no-download_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/free-robux-without-downloads-hypur_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/cheat-mine-simulateur-roblox_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/how-to-do-attack-seed-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/tiktok-views-free_GM835599320.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/claimrbx-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/how-to-hack-your-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/2021-roblox-hacks-february-2021_GM431946152.pdfIn PDF document text
    • http://www.travlbuzz.co.uk/uploaded_files/userfiles/files/roblox-free-vip-for-all-places_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_off00003408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3408 22820 bytes
SHA-256: 338d42fdf44f170cdc7bc461310963d8f417fa52f5d80dfce7c397a4885071ed
font_01_sfnt_off00006771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6771 19720 bytes
SHA-256: e7aa0a474f873a6e751f5083720d35e515444fa97241f03d9058db0775c81672

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