Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e52346c353c9ce…

MALICIOUS

PDF

38.7 KB Created: 2021-05-22 11:37:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f9d4b11ebd90ebdc3b923e28feb97f9c SHA-1: 0ffccce005feac653a36eaf92b1c0f1458cc5786 SHA-256: 04e52346c353c9ce8cc3fed6fbde716d29039b649346ed0a5919f5b3d707c36f
160 Risk Score

Malware Insights

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

The PDF contains multiple links, including one identified as a malicious redirector leading to a 'game hack' lure. The document body and embedded artifacts suggest an attempt to trick users into visiting malicious sites, likely for further exploitation or malware delivery. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/hack-robux-game-hack In PDF document text
    • https://heimatverein-oberlangen.de/images/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/how-to-hack-minecraft_GM479516143.pdfIn 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_002_off000032ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32EF 24596 bytes
SHA-256: db82b4e25e0c93d0a1c696f4d27098e16bcb874e78acdd4118b720ba34feba23
font_01_sfnt_off00006b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8C 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off0000759b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x759B 18248 bytes
SHA-256: 9805bb7d0eadd4beaac6fd3b5d5d8b6e8e5d33c97ce909732e364f826719e5d2

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