Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e985e405245b945…

MALICIOUS

PDF

37.4 KB Created: 2021-05-22 20:23:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f1d57791345e0de6f677c3d3c1171056 SHA-1: 152d0bf6f4763d8d79db72b622f3abb6282a3898 SHA-256: 3e985e405245b9455dbe3d350f651e355dcf1bf86c79bdb1091ae4af5c7bba60
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it is a lure for game hacks and fake invoices. It embeds multiple URLs, with the primary one leading to a site offering a 'free generator / game hack'. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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 invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/is-minecraft-dungeons-free-game-hack PDF link annotation
    • http://mbbs.hr/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-roblox_GM431946152.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_off00003100.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3100 28756 bytes
SHA-256: ccf66399fe8272411f1364dd1ed1c347cb0109eb7efbd93d85c6e7090699b860
font_01_sfnt_off000070c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C8 18304 bytes
SHA-256: ce690126d5ef6938f3c3401fec90eb29b657d34ca06495398573f2a883063706

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