Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c0efe1eebba915…

MALICIOUS

PDF

35.3 KB Created: 2021-06-22 23:10:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: de8ddf716f9d8a3c0d8001d34b0bd035 SHA-1: 03e635a1551cf91603c7ec0f9439172a7ac0bf44 SHA-256: d4c0efe1eebba915a19d99a01d54fa8156a3f628971c1d2d872ff41980bb40e0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links and document body text that explicitly promote 'free Robux' and 'game hacks' with a call to action. These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-ohne-human-verification-game-hack In PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/cm-spins_GM406889139.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/free-robux-apk-2021_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/cheat-codes-pegboard-nerds-roblox-music_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/best-free-software-to-make-thumbnails-on-roblox_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/robux-money_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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
font_00_sfnt_off000030a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A3 22792 bytes
SHA-256: 05ebf4c1a528de57d94242386dafc2f472a949fefdb8cc63c8befba3885b0c67
font_01_sfnt_off000063d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D5 19500 bytes
SHA-256: 082dca9197e8900253d6cfa01dc48baefa44da3759341bcf289a70c88cf5c924

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