Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9606a891587d005…

MALICIOUS

PDF

45.2 KB Created: 2021-05-16 07:02:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: cacea2393597e44bdea99dbefc254411 SHA-1: 954fb3083c2bfb62d475aacc74551cfe6f895562 SHA-256: c9606a891587d005fdbd2efb07bf7030aeda73d44ea8cc54ab8fdc6432171232
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and websites offering game hacks and free in-game currency, such as 'is-roblox-free-on-xbox-game-hack'. The document body and embedded links suggest a lure to trick users into visiting these sites, which likely serve as a gateway to further malicious content or downloads. No scripts were extracted, but the presence of multiple malicious URLs and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/431946152/is-roblox-free-on-xbox-game-hack In PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vivaahsathi.com/uploaded_files/userfiles/files/free-spins-coin-master-no-human-verification_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_003_off00004c33.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C33 24292 bytes
SHA-256: e4785aefc6a40485a9f987ea2738b3f1517102407c444628b9025303471903aa
font_01_sfnt_off000083e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E1 3120 bytes
SHA-256: 49734f51977507cba6bc8d3ad0cee0363aa119856db094427deb9cf565bb7bca
font_02_sfnt_off00008ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF5 17948 bytes
SHA-256: b3ba82aa7ee3d7aa0ce4ddaa3eca5cb497d3e48713e942ef8c08a7410c5f198f

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