Malicious PDF — malware analysis report

Static analysis result for SHA-256 42d096f5250e5e09…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 12:16:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3f5be87d2c993e3a614fe5b6f9302a88 SHA-1: 7b10b4cbebeb40bed7be6c47f65190f1f183cce3 SHA-256: 42d096f5250e5e09c6f25c0142c204dd714c26ff38104e6117c1fe412adb084e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free generators' for popular games. The ML classifier strongly indicates maliciousness, and the presence of a visual download button further supports a deceptive workflow. The primary IOC is the malicious redirector URL used in the lure.

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.tw/app/431946152/robloxhacks-game-hack In PDF document text
    • http://mb.its.ac.id/rbmb/repository/free-roblox-clothes-wiki_GM431946152.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/free-code-generator-roblox_GM431946152.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/how-to-get-free-robux-please_GM431946152.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/cops-and-robbers-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/hacks-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • http://mb.its.ac.id/rbmb/repository/coin-master-tricks_GM406889139.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
font_00_sfnt_off00002ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED2 22664 bytes
SHA-256: 2c5890a3955c2b0148af34147e6f7487532e730233835bd814f9df1da164d9e1
font_01_sfnt_off000061a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A6 18820 bytes
SHA-256: 2ccea82525463c59d3ef013baba30ec334edef503592fdffe768c3dcf14999d8

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