Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e96a4c1e0c88ef…

MALICIOUS

PDF

40.6 KB Created: 2021-05-15 22:30:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8e8eb8ddb9e49046bf4152a84b080133 SHA-1: 9ee1ce80fde77c389b20250c50c9bc6b723b8c31 SHA-256: 70e96a4c1e0c88efa4637f773623e70097443dc8b389ada1ab4376a5493f920a
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirector infrastructure, specifically advertising a 'free generator / game hack'. The document body, though heavily obfuscated, contains the same URL. This indicates a social engineering lure designed to trick users into visiting a malicious site, likely to download further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/free-coins-coin-master-2021-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000033f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33F1 27688 bytes
SHA-256: 1eeec2fea5ca7136664fdb3aafe75a261af9ffbf56e8c0a15b062c0a955e6a67
font_01_sfnt_off00007399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7399 2944 bytes
SHA-256: e8dca988325d5b5adea380508eed68725fcb814536e93cd420f224b7166adc23
font_02_sfnt_off00007dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC5 18112 bytes
SHA-256: 0727bd4027d3f5eec951b181c2bc31ee4d98e10eed2c862aff41d240a04f60ea

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