Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91a1d2211e1a53e…

MALICIOUS

PDF

34.2 KB Created: 2021-06-26 17:30:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 19e82a80a273829f28f5874f69594aa2 SHA-1: cba36ef0b5606e1dfac0a41a74afbb3e681dcf9d SHA-256: e91a1d2211e1a53e47661592041ac377e5a2c408ccee1688de01814cfbdfe117
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, masquerading as game hacks or generators. The ML classifier and specific PDF heuristics strongly indicate malicious intent. Although no scripts were extracted, the document's structure and embedded URLs suggest it is designed to trick users into visiting malicious sites, likely as part of a phishing or scam campaign.

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/free-roblox-mods-jailbreak-game-hack In PDF document text
    • http://charivne.info/ckfinder/userfiles/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/roblox-hack-ee_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/roblox-hack-tool-no-survey-only-images_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/howto-get-free-robux-without-survey-and-verification_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/roblox-account-stealing-hack-by-kingtennisbal_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/good-roblox-hack-reddit_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/getrobux-info_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/free-domnis-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/hack-apk-of-roblox_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/roblox-party-printables-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

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
font_00_sfnt_off00002f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2D 22000 bytes
SHA-256: ee58fd175f9ce003ad8228636fd1c15ac94dc42940b3ef1241d899ab3578321c
font_01_sfnt_off00005f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9A 19476 bytes
SHA-256: f28b569609be1d3a1984b878623e97f326062a2a77599993ac271799a21ee0aa

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