Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e475306dcc33fd…

MALICIOUS

PDF

38.4 KB Created: 2021-05-22 21:41:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c4ff73f2e06ba3262b5bcf2bd915c7e4 SHA-1: 55a126719e5a1c3ec3f136254165e94f0f553298 SHA-256: 10e475306dcc33fd30c3873c24ebfdef574a539c212ccb6156e45d9684c5fd5c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7268

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.xyz/app/479516143/free-minecraft-website-game-hack PDF link annotation
    • http://killebergsridsport.se/images/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/pokemon-go-free-coin-promo-code_GM1094591345.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/robux-no-human-verification-2021_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_002_off00003130.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3130 26712 bytes
SHA-256: c3dad0f57d9122f0295cff646456a5082e01364a6bbce1500244d0781001a694
font_01_sfnt_off00006bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFD 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000075ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75AE 17924 bytes
SHA-256: ff8b7dbb958b2e21889f0de65becea477e8c4948e76fdf7eea045243f3f10d1a

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