Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86cb1c5a4b1c9fd…

MALICIOUS

PDF

49.7 KB Created: 2021-06-07 18:29:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9ccba921c51c25d8e84a3877b2b5575b SHA-1: be68908827ca441a732559bd10803cb5874f4b38 SHA-256: f86cb1c5a4b1c9fdbba82a12430dc9531bdaf3238a35893a83d47ad4d69687b5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as game hacks and free item generators. The ML classifier also flagged this PDF as malicious. The presence of these links strongly suggests a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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 https://netcdn.tw/app/431946152/funny-roblox-outfits-and-free-outfits-game-hack In PDF document text
    • http://immo360grad.com/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/legenendary-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/free-robux-now_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-get-free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-truley-get-free-robux_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/john-doe-hacker-on-roblox_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/huskybuscom-free-robux_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
font_00_sfnt_off00005406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5406 32984 bytes
SHA-256: 94031faf419af538735d537c6a2f8596c3ca63f9561efc97c81a65f56eef70f2
font_01_sfnt_off00009ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EBE 18668 bytes
SHA-256: 996eabf621bf8fab29110e3b7683b8050f456d6e3d087b87f5b728441ca91940

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