Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a522ee2ac14377…

MALICIOUS

PDF

33.4 KB Created: 2021-07-21 15:20:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c5b6ce9818fb2e5aa9a912b7493526ab SHA-1: d5f6cfc1787eb2b6b20dac4c1b5162c2fcf8c5a1 SHA-256: a7a522ee2ac143779d18011a9d59596131cb519da87ad4a5e5978a7f1bf9b3ab
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 0.9942

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 http://netcdn.tw/app/406889139/daily-free-spins-for-coin-master-game-hack PDF link annotation
    • https://hbln.org.au/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://hbln.org.au/images/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://hbln.org.au/images/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://hbln.org.au/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://hbln.org.au/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://hbln.org.au/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://hbln.org.au/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://hbln.org.au/images/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://hbln.org.au/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://hbln.org.au/images/tiktok-views-free_GM835599320.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
stream_002_off00002af4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AF4 23676 bytes
SHA-256: f0f33e3e08520a1e5aafdeea06dea15277f2a5a948e77fa78b9c68c66ed4df3c
font_01_sfnt_off000060ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AE 18308 bytes
SHA-256: b750d5a8b44caccc122b2ff8294eb9307e18e87e3916697a2a7f0c063c77f291

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