Malicious PDF — malware analysis report

Static analysis result for SHA-256 081a9b8b8f9db6ab…

MALICIOUS

PDF

42.1 KB Created: 2021-05-16 14:49:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 25325ab92d096e97bfa686f9ebfb988b SHA-1: 2aabc5bb5883efc70455a2c7efa5002a13c2efc9 SHA-256: 081a9b8b8f9db6ab21e8cdb5c9101f1e71f94d8edda494a7e50ed0ddc4e8c4e7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links to a known malicious redirector infrastructure, specifically advertising 'Coin Master Free Cards 2021' and similar game-related lures. The embedded URLs suggest a phishing or scam attempt to trick users into downloading further malicious content. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-free-cards-2021-game-hack In PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/roblox-gang-rape_GM431946152.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/roblox-top_GM431946152.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/blox-rewards_GM431946152.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.abilityireland.com/uploaded_files/userfiles/files/roblox-bux-free_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
stream_003_off000049a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A5 25020 bytes
SHA-256: 3615841cef459a39081f3e27dec17bbe9d6fa5d3087156fd80a64fef40eaee5a
font_01_sfnt_off000081f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F9 18288 bytes
SHA-256: 1103c1a9052967993c67e1ec6a20b7963a45820bc749ae4085be8aaf66ba1d93

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