Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b98a6f3eaf8b0bb…

MALICIOUS

PDF

41.2 KB Created: 2021-05-17 13:41:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b7682002f8d014deaa8897c9fd092f96 SHA-1: ad778d7f62adab4e0b85f4d30b123f8f14f794e9 SHA-256: 6b98a6f3eaf8b0bb3388513b0e2a5be38ee88b4d4fb7700f6690f77cad761f3a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising game hacks and free items to lure victims. The primary redirector URL is 'https://netcdn.xyz/app/406889139/hack-coin-master-no-verification-game-hack'. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a social engineering attack designed to lead users to potentially malicious websites or phishing pages.

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/hack-coin-master-no-verification-game-hack In PDF document text
    • https://tecturatw.com/image/data/files/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-roblox-toys_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/robux-giver_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/how-to-get-free-things-on-roblox_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
stream_003_off0000484a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x484A 24316 bytes
SHA-256: 0e801f748f9a75b3b06e38e14d0e2334d212de5df2b6f895ebd0c168056884d6
font_01_sfnt_off00007fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA9 17848 bytes
SHA-256: 9aea3c3bd6d72a301cebd4b8c3a59d28c82f5f14f1d448acc55e037e8952ee0a

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