Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a86ea88c2554dac…

MALICIOUS

PDF

34.0 KB Created: 2021-06-20 04:21:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3e94b9bb4737c16a167ee928df35052e SHA-1: 90f5d50a1dbdffc3d4c8c8fb83a05cb9d51ff864 SHA-256: 8a86ea88c2554dac43ce14e242680b7f18ec869ae8c4fae396689513121700e5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector. The document body and heuristics suggest a lure for game hacks, likely intended to lead users to phishing or malware download sites. No scripts were extracted, but the embedded URLs and the nature of the lure indicate a phishing or potentially a downloader attack pattern.

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/fashion-frenzy-roblox-free-online-game-hack In PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/how-to-hack-yourself-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/roblox-hack-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/hack-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/pokemon-go-free-gps-hack_GM1094591345.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://dndprinting.com/new/public/ckfinder/userfiles/files/coin-master-card-hack-app_GM406889139.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
font_00_sfnt_off0000308c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308C 21404 bytes
SHA-256: 7104b478d2d72f85949bbe4e5f6b0515e8945772a0fb313ac52080db656e2801
font_01_sfnt_off00005f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F66 19200 bytes
SHA-256: 8397fd7873a1a44873a56c750aff9fdd8573246f09113272fd45d875ec0dafbd

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