Malicious PDF — malware analysis report

Static analysis result for SHA-256 9831b54b22f15cba…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 14:25:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 59c48b728aef813fbf82cea991d7e51c SHA-1: 4d3d9737195616b1932bfc97b4d7f08b79b3b4e8 SHA-256: 9831b54b22f15cba393b3d2e23aa69a7a6df92c031f7e25136392319d95d7239
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it's a malicious redirector lure, specifically targeting users interested in game hacks and generators. The embedded URL 'http://netcdn.tw/app/406889139/coinmaster-game-hack' is flagged as malicious infrastructure. The document body, though partially garbled, contains references to game hacks and URLs, reinforcing the lure. No scripts were extracted, but the primary attack pattern is a phishing lure leading to a malicious redirector.

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/406889139/coinmaster-game-hack In PDF document text
    • https://www.sonestad.se/library/repository/free-robux-admin-codes_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-rocitizens-cheat-codes_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/getrobux-now_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-free-animations-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/best-site-for-free-coin-master-free-spins_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_off00003263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3263 22908 bytes
SHA-256: 5e3ed248183d1b15871a22b5763afb51750b33a8e9a79bdc4cc3515440b79475
font_01_sfnt_off000065b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B3 18092 bytes
SHA-256: aeec47090e2d397d52e6994ac52fcd26f4fdd646fe6594f845e9ca54af877ae9

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