Malicious PDF — malware analysis report

Static analysis result for SHA-256 23564aa2fc023fdd…

MALICIOUS

PDF

40.5 KB Created: 2021-05-11 00:02:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 27c442784ebaaf09da5482e4cd8fb6f7 SHA-1: 5d6ad8dedfabd0e150571cddb51e4f0a7383eeef SHA-256: 23564aa2fc023fddcb2cc60a801e3220de9065b84a85e7bede469dbaac7ba5ce
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a malicious redirector link, specifically promoting a 'game hack generator'. The embedded URL leads to a known malicious domain, suggesting an attempt to trick users into downloading potentially harmful content. While no scripts were directly extracted, the PDF structure and heuristics indicate a social engineering lure for malware delivery.

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/how-to-hack-coin-master-using-es-file-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_off000033dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33DD 30148 bytes
SHA-256: 99e2aa15f5729d2e7315c2742595cf3289ef98c7014913684740a37c66fb7092
font_01_sfnt_off0000716b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x716B 18592 bytes
SHA-256: 7b6829f0c912f355393962c39643cd2cadf5d604c17bb92301d7763a729473f1
font_02_sfnt_off00009453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9453 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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