Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e7e2d145991bc8…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 11:49:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2bf206ee6c8b19d69a1a8582a73df990 SHA-1: cf449bf992f15ef3e9fdb6ae00b962a37413d941 SHA-256: 59e7e2d145991bc8cbb882f0efc636cd552fd70f2acf877277ece761baa10687
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a malicious URL, masquerading as a game hack or free spins generator. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links confirms a malicious intent to lead the user to a potentially harmful site. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/406889139/coin-master-claim-free-spins-game-hack In PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51BF 25056 bytes
SHA-256: 1de108e305c5f860315dcd46279a970176b9294f3745f1a736795e7cb8f87630
font_01_sfnt_off0000898c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x898C 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9377 18220 bytes
SHA-256: 4508a7247666ecd7f475af3e2510e2d7297b60fda6d209b486c2dc6be28a63e8

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