Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc5be403a88e088…

MALICIOUS

PDF

41.1 KB Created: 2021-05-16 07:04:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7f12e6b3be5aaff4ac9f8b0ec6729e45 SHA-1: fcd8c45222cfc3a1cd5a9b493a3d267ce521877d SHA-256: 2bc5be403a88e08809659c883bfd6dcd63b33c3781f603e8875a7fe63cb3f3ad
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one pointing to known malicious redirector infrastructure. The primary link leads to a "free coins" generator lure, which is a common tactic for distributing malware or leading users to phishing sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick the user into downloading a payload or visiting a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/free-coins-coin-master-no-human-verification-game-hack In PDF document text
    • https://www.tena-g.hr/files/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-free-download_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/roblox-moderators_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-free-spin-reward-links_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
stream_003_off000045b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45B4 25048 bytes
SHA-256: 7b27255644d236cf2f8af970c33a373abef1e86062d966450c12d3614ef3e1ec
font_01_sfnt_off00007e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9B 18244 bytes
SHA-256: 01d63b1d73aa8bf8d24c0c61ee418a5c78711e36496b8284aaee89190376465e

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