Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc06a02acae8774…

MALICIOUS

PDF

41.1 KB Created: 2021-05-21 14:41:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 987674f22e2d2147f12180f936faab62 SHA-1: 10d2e3b267530ed77222dcae4e91dcdf10dab628 SHA-256: 7fc06a02acae8774f69776f696a939402a7c771bfe4a4c0a1d565c7b42f7cd67
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.7471

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/431946152/free-robux-hacks-no-verification-game-hack PDF link annotation
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/www-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/how-to-play-roblox-for-free_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_off0000364b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x364B 26508 bytes
SHA-256: 25e42e8cbccd8cc2a741a88dd64cd06297cb2d09cdb16f33121388f3fb556367
font_01_sfnt_off0000737f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x737F 2984 bytes
SHA-256: 2df87bbe4e27b27e34c872c092d0522acd977d05f5cbde7ed5e1fdfeb59cb318
font_02_sfnt_off00007dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCC 18772 bytes
SHA-256: addbd32849de550f6a3cbf56c70cbffa7cf804e2f09d57d2f784457513eafccd

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