Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa5f8ef784031af9…

MALICIOUS

PDF

39.7 KB Created: 2021-05-21 17:01:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d3b4dcec256cca3eb3edd1255e6baedc SHA-1: d320e17640a9bb424aeb9b9a7721c302afc5dc2f SHA-256: aa5f8ef784031af9306c85726cd63029f6feaf327447e7bf75b540762a3ec886
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 0.9476

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/minecraft-mobile-free-game-hack PDF link annotation
    • http://fmbompastor.com.br/images/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-roblox-printables_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-unlimited-coins-hack-apk-download_GM406889139.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_off00003416.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3416 32184 bytes
SHA-256: a2f3cb93e185ec73c17c79fcfb21cc9114c45cea89c3160d43fc2e623681e76a
font_01_sfnt_off00007b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B65 17944 bytes
SHA-256: ce10a2b2c496b69fcf76f31cd4916c063e1dd9befde4055646c3ea28f41e8e8e

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