Malicious PDF — malware analysis report

Static analysis result for SHA-256 057830f906a0c311…

MALICIOUS

PDF

45.9 KB Created: 2021-06-08 14:08:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e5892fad880c78453e8d95f67edd5bcf SHA-1: 1654f5970aa3cce178c676b5e7c144a51c0f9fc6 SHA-256: 057830f906a0c3113661a8adcc6cc0fd8b43b58c05cb21b563832ce2cd6fba5e
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many of which are part of a link farm designed to host SEO-optimized PDF files. The primary lure appears to be related to game hacks and free items, directing users to a malicious redirector. The document body, though partially corrupted, contains text related to 'free cute clothes on Roblox' and a URL matching the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/how-to-get-free-cute-clothes-on-roblox-game-hack In PDF document text
    • http://leagueforwomenrights.gr/images/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/how-to-get-lots-of-robux-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/how-to-get-minecraft-for-free-2021_GM479516143.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
stream_004_off000054d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54D9 25620 bytes
SHA-256: 2c0518701db92e16a149ad9467a7e9396069cdedccbba56cebe42f969004e756
font_01_sfnt_off00009050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9050 18520 bytes
SHA-256: 5e28e761249425644129963f40aedc63dc5eb495521f9ef44abd00a29aaab274

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