Malicious PDF — malware analysis report

Static analysis result for SHA-256 90cd98bf8c2eec43…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 09:04:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6d916a91900443bfd15143e5a04378ac SHA-1: 6b93723efe8b8b1a06c56333db37d85c60482851 SHA-256: 90cd98bf8c2eec439a4e0666b61baaacdbcb3ac99b99b472660174995ce8f6b6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The primary malicious URL identified is https://netcdn.online/app/406889139/free-spins-for-coin-master-game-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack aimed at driving traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/free-spins-for-coin-master-game-game-hack In PDF document text
    • https://www.ma-plast.hr/files/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-hack-september-2021_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e15.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E15 24816 bytes
SHA-256: cc2173abda33955e90254ce40c28778dc562e86382e3d4d0fff676f2368d3fc4
font_01_sfnt_off000086bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86BD 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off0000906e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x906E 18148 bytes
SHA-256: 3d9eadf91671033e4331a310c0b0805123b3ad5df85bc8ef5d318b7854ffa5cb

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