Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ab75254ca94cd6…

MALICIOUS

PDF

35.9 KB Created: 2021-06-18 07:01:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 527c9919404b38db161c9baee70f096f SHA-1: 6cf9da46d9d3aa3579394beb56899209a20992df SHA-256: a7ab75254ca94cd6e0ab10e31503e6793a2ba1cbaba8226f89484c1dfe8d8a97
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that lead to a malicious redirector infrastructure, disguised as a 'game hack' generator. The ML classifier strongly indicated maliciousness, and the document body, though partially corrupted, contains references to game hacks and URLs. No scripts were extracted, but the primary attack vector appears to be social engineering via a lure to a malicious website.

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.co/app/431946152/how-to-cheat-on-roblox-piano-game-hack In PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/how-to-get-rogue-lineage-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/coin-master-homepage_GM406889139.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.beritabali.com/new/public/ckfinder/userfiles/files/is-roblox-studio-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_002_off000035c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35C9 22280 bytes
SHA-256: 51bd426a98ebf27ee02de74e50c1acfe57d6f72c2ad2909834d332c5f29c7999
font_01_sfnt_off0000678b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x678B 19008 bytes
SHA-256: 4ed41cb8158c38a3a9ca96dd2f5d86d647e8100854a3e15a594dfd4759344a32

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