Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a259e69fc4af2e…

MALICIOUS

PDF

44.4 KB Created: 2021-05-11 03:37:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 05e8ade2b2b67891dc449a0b80bbc016 SHA-1: f452ca8c6227eaff3dc4e49f5446ddf6910da382 SHA-256: a3a259e69fc4af2e86e7e2e1534b8d6eaba0f387b1102da88dab6512029a2665
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to a malicious domain, masquerading as a game hack generator. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a malicious workflow. No scripts were extracted, but the document's structure and embedded URLs are indicative of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/coin-master-hack-programmers-game-hack In PDF document text
    • http://maestriadental.com/images/coin-master-download_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/woman-roblox_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/roblox-phantom-forces-hack_GM431946152.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_off000047da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47DA 24828 bytes
SHA-256: fb33b4603ba349c9f77701d9db2748784f02a0209b112ee7ebdd8c0074532a6f
font_01_sfnt_off00008095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8095 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A80 18416 bytes
SHA-256: 9b1b86d518bbcbecce2ac7037f2b10fa6fa9b3d2e28cf0c2cd03817ae8459785

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