Malicious PDF — malware analysis report

Static analysis result for SHA-256 df7ad3aadbcc8a09…

MALICIOUS

PDF

36.7 KB Created: 2021-05-11 22:31:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7a687fd3cecb817ed7a2ca026a3ccff2 SHA-1: 6b43723a04a235dcaa0ae34cd68d1df87836ac1b SHA-256: df7ad3aadbcc8a09a1090f9df9a2ee4bbdfc93c6975f9eb15cbfe35da71aae77
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a malicious URL, presented as a 'free generator' or 'game hack' for Coin Master. This indicates a social engineering lure to trick the user into visiting a potentially harmful site. The document body and heuristics confirm the presence of malicious redirector links.

Machine Learning

  • Nyx PDF Classifier clean score 0.0292

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 https://netcdn.xyz/app/406889139/coin-master-free-spins-no-generator-game-hack In 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_off0000330a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x330A 27308 bytes
SHA-256: 994b7f1862d82af20d2829139c29937544f00e42c5617244600b3de42f6c2436
font_01_sfnt_off00006f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F50 17884 bytes
SHA-256: be10e099a7c354b0305597b11d5de042d5d5c0c9f98208c4fce8626ff21c336c

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