Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b4fdff28ff9b634…

MALICIOUS

PDF

42.6 KB Created: 2021-05-13 07:05:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a1ab4f90e0191568ec019232e6a3da2d SHA-1: 302616fbbd26cad67f7dbec9b209cc835cc816cd SHA-256: 1b4fdff28ff9b6349f8cb268ef9495c7a5a935f390dc1989b1ac6ec37269fbec
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into downloading game hacks and cheats. The primary link, https://netcdn.xyz/app/406889139/master-coin-hack-mod-game-hack, is flagged as a malicious redirector. The document's structure and content strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/master-coin-hack-mod-game-hack In PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/minecraft-wurst_GM479516143.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/rbx-robux_GM431946152.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.man1lahat.sch.id/__statics/gudangsoal/files/best-free-minecraft-texture-packs_GM479516143.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_off00004ba2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA2 25316 bytes
SHA-256: b4f86a86f57fcc884367339ab7bad3496f69b6ec1e968e265c9fd7292b695159
font_01_sfnt_off00008540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8540 17888 bytes
SHA-256: 79663f5c6e364485b04b83db578590d29b6e1ee38eddb5c45b054f63581374ad

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