Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9687d341259972a…

MALICIOUS

PDF

39.7 KB Created: 2021-05-21 20:54:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1d31e272a55703a6462e0f8357b82ff0 SHA-1: 209b942fa0801e876332281cb1fba9ed9a61975b SHA-256: d9687d341259972a0e79fc3e246607ef9e7b4ec469dba5936584d0bc01c81216
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a URL promising game hacks, a common lure for malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to trick the user into downloading further malicious content or visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/431946152/roblox-free-exploits-game-hack PDF link annotation
    • http://bepquannhu.vn/upload/editor/files/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-free-spin-today_GM406889139.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_off0000325a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x325A 26896 bytes
SHA-256: d11fa63655846d414e218c06e6e4380c3045344589dacf0a8787d873637ad9e6
font_01_sfnt_off00006f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3C 2956 bytes
SHA-256: 7afcbc6afeafc927d10c29b8cc09bc3a46870eb52793bc1217b542c68b3b1aca
font_02_sfnt_off0000797b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x797B 18348 bytes
SHA-256: 6c925dd72bfdbeb9e5985c11867b62b97a75752c64c0caf4da45c40d6edb98e2

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