Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc7487e586d2670…

MALICIOUS

PDF

38.1 KB Created: 2021-05-21 01:19:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 69205b83d742c5bbb54cfe4da76fc2ed SHA-1: 214a8d1021bbc2165fb72cbcd5ebd96dd46f2e3c SHA-256: 1dc7487e586d2670ead91a5df24bb3b0cadd96f604bae9060212d4fc213e8c24
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent call-to-action for a "free Robux generator" or "game hack". The primary URL, https://netcdn.xyz/app/431946152/lazyblocks-com-free-robux-game-hack, is associated with a high-severity heuristic indicating a lure for game hacks. The document body, though partially corrupted, contains text related to free Robux and a call to action, reinforcing the phishing pretext. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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/lazyblocks-com-free-robux-game-hack PDF link annotation
    • http://axiapublishers.com/images/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/whats-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_002_off000032e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32E5 26900 bytes
SHA-256: 011171a2a0c0a6e3b9e88983ab6f75601d21a7b4365f36163fcbc980b3675640
font_01_sfnt_off000071b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B6 19008 bytes
SHA-256: 000d85757c2dbc774c4a4ed19607b9025a632ba167ee8131c5b8e6d7f50f0f1c

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