Malicious PDF — malware analysis report

Static analysis result for SHA-256 05c042b2a67235b5…

MALICIOUS

PDF

41.6 KB Created: 2021-05-13 10:45:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 2ba226634eca2511e5b752d9f6bf288d SHA-1: cf6c92071ea043e628889ad9b71b314383b16d28 SHA-256: 05c042b2a67235b5311d86ec64c1f23209a10025f8e2bf34a8295d8e74e41336
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a primary focus on a malicious redirector related to 'free Robux' and 'game hacks'. The document body, though partially corrupted, also contains similar lures and URLs. The presence of PDF-specific heuristics for malicious redirectors and game hack lures strongly indicates a phishing or scam attempt designed to lead users to potentially harmful content.

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/431946152/how-to-get-free-robux-without-email-game-hack In PDF document text
    • https://www.atrax.hr/files/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/real-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/static-moonactive_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/minecraft-free-school_GM479516143.pdfIn PDF document text
    • https://direct-link.netIn 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
font_00_sfnt_off000046a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46A3 24544 bytes
SHA-256: afb88610bba7b70bd9ef2b25508728acb8c485b0d78d1b04011e4ad08ccc684c
font_01_sfnt_off00007d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D47 19328 bytes
SHA-256: 2bb545c14ce80967bc964a539ce1fba7d75b9199f0e299556cda79647f99e488

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