Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf6982f53b69ff0…

MALICIOUS

PDF

35.6 KB Created: 2021-06-22 21:43:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2c7eefe37ad8d52f27edaac0fd400773 SHA-1: d6487cdaa1aeb671657a54b467ea7575a950116b SHA-256: aaf6982f53b69ff0549416510ecb05b62b8ba1d8c19e8e12f1fedd0cf357b83d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded links and a document body referencing game hacks and free virtual currency, strongly suggesting a lure for users to download malicious content or visit phishing sites. The PDF_SEO_LINK_FARM heuristic indicates a mass of external links, and the ML_NYX_PDF_MALICIOUS score of 0.998 confirms a high probability of malicious intent. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-hack-roblox-jailbreak-game-hack
    • https://schneider-und-berger.de/images/how-to-get-free-robux-no-human-verivication_GM431946152.pdf
    • https://schneider-und-berger.de/images/roblox-hack-version-free-download_GM431946152.pdf
    • https://schneider-und-berger.de/images/infinite-yield-hack-roblox_GM431946152.pdf
    • https://schneider-und-berger.de/images/i-got-hacked-on-roblox_GM431946152.pdf
    • https://schneider-und-berger.de/images/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdf
    • https://schneider-und-berger.de/images/get-easy-free-robux_GM431946152.pdf
    • https://schneider-und-berger.de/images/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • https://schneider-und-berger.de/images/rbx-gg-free-robux_GM431946152.pdf
    • https://schneider-und-berger.de/images/free-robux-codes-generator_GM431946152.pdf
    • https://schneider-und-berger.de/images/coin-master-daily-free-spins-link-app_GM406889139.pdf
    • https://schneider-und-berger.de/images/how-to-teleport-hack-in-roblox-jailbreak_GM431946152.pdf
    • https://schneider-und-berger.de/images/coin-master-free-spins-link-2021_GM406889139.pdf
    • https://schneider-und-berger.de/images/booga-booga-roblox-hack-code_GM431946152.pdf
    • https://schneider-und-berger.de/images/free-robux-no-verification-2021-pc_GM431946152.pdf
    • https://schneider-und-berger.de/images/roblox-urbis-hack-with-cheat-engine_GM431946152.pdf
    • https://schneider-und-berger.de/images/roblox-skyscraper-tycoon-hack-script-pastebin_GM431946152.pdf
    • https://schneider-und-berger.de/images/coin-master-free-spins-2021_GM406889139.pdf
    • https://schneider-und-berger.de/images/play-minecraft-free-online-no-download_GM479516143.pdf
    • https://schneider-und-berger.de/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdf
    • https://schneider-und-berger.de/images/free-spins-on-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032bf.bin
2dfb78dc40cfae5f2d7b761c4c31e96fae42b9f11aa39c4c7e8bf4bc4c4d6b54
pdf-font-stream PDF embedded font (sfnt) at offset 0x32BF 22968 bytes
font_01_sfnt_off000065f1.bin
e5205e2a7d449b80125847cf13993245a1eb0bba6825dd5832f4a5c2e9c5e231
pdf-font-stream PDF embedded font (sfnt) at offset 0x65F1 19104 bytes