Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dffeabceb2dcd73…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 18:50:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: dfeaf50cd55a8224408f2a9ca20e69a5 SHA-1: 61f1f7a77e782cb0b2462bdc1970193360b8d010 SHA-256: 7dffeabceb2dcd73beaacedf506ae0276b71d6c48db8c64cf136cfab1e3bee52
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks, specifically referencing Roblox, and embeds a URL that redirects to a malicious site. This suggests an attempt to trick users into visiting a compromised or malicious webpage, likely for credential harvesting or further malware delivery. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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 https://netcdn.online/app/431946152/roblox-old-avatar-game-hack PDF link annotation
    • http://jarviskeller.co.uk/media/storage/editor/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/abd-roblox_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/pokemon-go-free-hack-download_GM1094591345.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/how-to-make-free-robux_GM431946152.pdfIn 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_off000053c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53C5 25540 bytes
SHA-256: 9a0735e59abc0653e33897c8790aac016b3824f2ae1ab16e933268681a7d403e
font_01_sfnt_off00008d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D95 18404 bytes
SHA-256: 3ee04b9976b2778629c251408a788a05adb62cbea0810dca153e44138bd3c832

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