Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c02a5d5b3b52be…

MALICIOUS

PDF

33.0 KB Created: 2021-07-19 06:42:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: e7c15f507e65a36b3bc8c9c337438ec0 SHA-1: 3bd8cc12e90054878310077d434bcd7518a77f90 SHA-256: 70c02a5d5b3b52bed372e6b57b535195306c6aa470af9c40c5acd1e81ad3b1ae
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically advertising a 'Coin Master Claim Free Spins' generator. The document body and embedded links strongly suggest a social engineering lure to drive traffic to potentially malicious websites. No scripts were extracted, but the presence of malicious links indicates a high likelihood of further payload delivery or phishing.

Machine Learning

  • Nyx PDF Classifier clean score 0.0909

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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 http://netcdn.tw/app/406889139/coin-master-claim-free-spins-game-hack In PDF document text
    • http://e-learning.min2kotapalangkaraya.sch.id/__statics/gudangsoal/files/promo-codes-for-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
font_00_sfnt_off00002d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D89 22624 bytes
SHA-256: ec12bfb31c6584091d9abdadc7a5af44b492e603a1ed40e7084cf41ccfcd1e05
font_01_sfnt_off00005ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFB 18220 bytes
SHA-256: 4508a7247666ecd7f475af3e2510e2d7297b60fda6d209b486c2dc6be28a63e8

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