Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ca6f0444062790…

MALICIOUS

PDF

39.8 KB Created: 2021-05-10 13:37:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a47bfc22310d9a682dbf6372f448a6ee SHA-1: a7e454abb0aa0ab556070f1646c60772b4e66e9e SHA-256: 79ca6f0444062790b5326d282941c4e03eae86dc4287a6f1fbbcb17cdb8c28e1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and free currency, such as 'www-robux-redeem-game-hack'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a social engineering tactic to trick users into visiting potentially malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/www-robux-redeem-game-hack PDF link annotation
    • http://www.mondecasa.com/Public/upload/editorfiles/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/roblox-free-robux_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_003_off00003cd9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3CD9 25604 bytes
SHA-256: fcb5a1019711ee618b88e78acd37dad69e82285c8c340fc4d235a029d8c49688
font_01_sfnt_off000078ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78AD 18648 bytes
SHA-256: 61e1175fd0613718da88e3f59775346477bef0226bc79823f694c1fc9380e365

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