Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c06ba7c23bf200c…

MALICIOUS

PDF

38.6 KB Created: 2021-05-21 14:11:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ef32e2fb0bb43a2665dba785b361c1d7 SHA-1: c0a9caef357241381ad24432d2b6ac31bbc14729 SHA-256: 8c06ba7c23bf200c540c9cb6efaf3b3b27e023cd019d1aa621a339fe7fb8bfd2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'Free Robux' and a prominent link to a generator site, indicating a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious websites. The presence of multiple related PDF URLs further supports a campaign distributing such lures.

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/431946152/free-robux-that-actually-works-2021-game-hack PDF link annotation
    • http://dieter-sauter.com/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.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
font_00_sfnt_off00003337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3337 27736 bytes
SHA-256: ff3f60e4eca963858d16ca7643bd3dfafa09b9631fb5dec094779be53a9ecfc4
font_01_sfnt_off000071ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71EA 19536 bytes
SHA-256: e162f10ab45425f1911b766a767f4688be22e04cba15be94f938466a51fc2df0

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