Malicious PDF — malware analysis report

Static analysis result for SHA-256 e792309f6ffab9c9…

MALICIOUS

PDF

34.3 KB Created: 2021-05-20 13:01:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d56766d8d7851b22dee2bab5be508d22 SHA-1: e8ff21be32f30e9ab5c0b87ea9b55d839f9a743f SHA-256: e792309f6ffab9c9e604664f9b9eabb01ab16cb66ef2c020ca6fdd3a40bf68a3
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links pointing to malicious redirector infrastructure, specifically advertising a "free generator / game hack". The document body reinforces this lure with similar text and a call to action. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0116

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/431946152/free-robux-codes-2021-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000163d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163D 23656 bytes
SHA-256: 721ec3d0528b74a1dff6ad653a3d88a398b2ea2669918403a95c681e7c62b2f2
font_01_sfnt_off00004bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF2 3964 bytes
SHA-256: f6b9a386ee4e0aff622a98b2230905da71eab0ca98398cb52018fda3528d3e2a
font_02_sfnt_off0000594f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x594F 3396 bytes
SHA-256: e59bc53cd4c0ee65dc1533becad2866f345dcb060e6c68bb8187d21cb9f973ee
font_03_sfnt_off00006541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6541 18012 bytes
SHA-256: 7d573ada0d548864d07eb289c10aa095cb3198a9a25c61ad4bb34178648b7f02

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