Malicious PDF — malware analysis report

Static analysis result for SHA-256 022269107b03f1e4…

MALICIOUS

PDF

51.0 KB Created: 2021-06-03 08:13:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9ed1a4e13224b73eab639b8dc83f0f56 SHA-1: 13f777572a123b1bcbae381a1206b806a3b950bf SHA-256: 022269107b03f1e42cc97e7bdf7e20c6ee0472847c0a1f06c57d921e88ed700a
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are part of a link farm designed to attract users with lures for game hacks and free currency. The primary redirector URL, https://netcdn.online/app/406889139/coin-master-games-download-free-game-hack, is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9713

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.online/app/406889139/coin-master-games-download-free-game-hack In PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/robux-today_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/roblox-redeem_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000054f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54F7 24500 bytes
SHA-256: 259b826566757c44bdca43c130ae2de3887717db468d39c604f18eafe0890b9f
font_01_sfnt_off00008c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C33 4028 bytes
SHA-256: a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91
font_02_sfnt_off000099d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D3 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off0000a3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3C2 18548 bytes
SHA-256: bf0010eea28238cadeb536793d42f80382de1e22dde51f6e5fd1d23f73abc266