Malicious PDF — malware analysis report

Static analysis result for SHA-256 05891359e32e26ea…

MALICIOUS

PDF

45.3 KB Created: 2021-06-04 01:12:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9099bf7503fa0bb8f9523ab514f28c79 SHA-1: bb54f9bd989c350bf860ed28b628f8a05ff996d7 SHA-256: 05891359e32e26ead808670a17d66f6dbf7db255a4181bc90ecccea2d20a3aae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors and lures users with promises of 'free Robux' or 'game hacks'. The primary link directs to a URL associated with malicious activity, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/how-to-get-free-robux-easy-game-hack In PDF document text
    • http://library.stieyapan.ac.id//repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/robux-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-cool-free-tshirts_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/www-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/when-pokemon-go-free-will_GM1094591345.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hack-version-coin-master-apk_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
stream_004_off0000527d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x527D 25340 bytes
SHA-256: 6efe5146c25cd1c133ed3f1ebadde84f08fb66976398c59a8b45ab8fad8e7970
font_01_sfnt_off00008d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D24 18688 bytes
SHA-256: afa93f6b5b78c11c56913a3e0021d293f85f1b4278f41e2b8713ad9a89f051de

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