Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff6b5e3f7a87058…

MALICIOUS

PDF

34.4 KB Created: 2021-06-18 05:22:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 594ebe7b324398f48301e85a3c20295f SHA-1: 03d43497d05d73e61ced215789e9a593a0992bb5 SHA-256: eff6b5e3f7a870588a2a6e0866152b7ed455b67c1789d93f206c158b1d42c1b2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a document body that explicitly advertises 'free generator / game hack' content, directing users to a known malicious redirector. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users with fake offers to a malicious site, likely for credential harvesting or malware distribution.

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/roblox-account-free-trial-game-hack In PDF document text
    • https://opac.umrah.ac.id/repository/free-ps4-games-like-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/comment-hacker-roblox-facilement-sur-pc-2021-en-francais_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-fans-on-tiktok_GM835599320.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/no-human-verification_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-in_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-hack-free-download_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/2021-roblox-hacks-february-2021_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_off00002f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F23 22504 bytes
SHA-256: 6f5b63b588bb854a19ccf99c7b18f239dd9eed1ecfd5332e5a90cba7c5164b30
font_01_sfnt_off00006164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6164 19012 bytes
SHA-256: cd85328138fadd85e39575a4528ddc03ff21cc31d4fa3e492207f0e9aae16193

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