Malicious PDF — malware analysis report

Static analysis result for SHA-256 56eb62ee1c85bd29…

MALICIOUS

PDF

35.5 KB Created: 2021-05-14 02:42:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 543b9616397c66bb7fc4beccfac6edc2 SHA-1: 3065ead814beda162fa52945ba6028fddad08015 SHA-256: 56eb62ee1c85bd29fd0126c79a7815bfb1a28b7a09f025b1ba3a5ee007db3fba
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded links that redirect to malicious infrastructure, specifically advertising a 'free generator / game hack'. The document body also contains text and links related to this lure. The presence of multiple malicious redirector links indicates a high likelihood of this document being used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

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/twitter-coin-master-free-spins-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_off000031ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31ED 24376 bytes
SHA-256: 93ad6237e5d90c9e538d94db082c77e2dc01e76e002d1e58434b9171e94e1d76
font_01_sfnt_off000069d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D1 18052 bytes
SHA-256: 06f68ec0900a8a665d0c319e95253c201ab611d648accf1df96cbabceb79519f

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