Malicious PDF — malware analysis report

Static analysis result for SHA-256 42155a897c207f4c…

MALICIOUS

PDF

35.7 KB Created: 2021-07-06 07:20:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c73185dea9d597c52fedf124ad1bf558 SHA-1: c89fbd298acf3bb6b2df9d3edd219a44b8704eba SHA-256: 42155a897c207f4c24296a3603aa9c211047085a0a13bbf5e22aa87a348950ed
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering 'free game hacks' and 'free robux', a common lure for malware distribution. The heuristic firings confirm these links point to malicious redirector infrastructure. While no scripts were extracted, the document's structure and embedded links strongly suggest it is designed to trick users into downloading and executing further malicious payloads.

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/479516143/download-minecraft-java-edition-free-game-hack In PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-do-speed-hack-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-generator-unlimited-robux-and-tix_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/hack-roblox-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/kick-off-reach-hack-roblox_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/robux-hack-no-download-games_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/oblivion-hack-roblox_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-roblox-outfits-girl_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-hack-games-in-roblox_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-hack-999999-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-prison-life-hack-with-injector_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-hack-in-roblox-prison-life-v20_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-mobile-hack-tool-download_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/2021-robux-on-robux-free_GM431946152.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_off000034d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34D1 22632 bytes
SHA-256: 6bdac29c17d3eaa3e16da324ac7b226ab171df48c6921ec2e0352a4092323072
font_01_sfnt_off00006700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6700 18856 bytes
SHA-256: e95e0befe6b0f5e52bf26004d68c5314d9c4319229837ab9b7c393f21c81bf12

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