Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad3ddffa4fbcc35…

MALICIOUS

PDF

38.9 KB Created: 2021-05-21 22:10:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5ed866db65e6ddca17b6cf315e77baf6 SHA-1: 4b59e906621b09d6fb64872bdca339ebd5847766 SHA-256: 0ad3ddffa4fbcc35ece09e3bf9b5bcbe2c4d884385c8f4c863200addb29ba0a5
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, including one for a 'game hack' lure. The document body explicitly mentions 'Minecraft Free Download Windows' and 'CLICK HERE TO ACCESS MINECRAFT GENERATOR', reinforcing the lure. While no scripts were extracted, the presence of embedded URLs and the ML classifier's high confidence suggest the document is designed to redirect users to potentially malicious sites, likely for further exploitation or malware delivery.

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/479516143/minecraft-free-download-windows-game-hack In PDF document text
    • https://www.europap.cz/images/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • https://www.europap.cz/images/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://www.europap.cz/images/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.europap.cz/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://www.europap.cz/images/roblox-free-robux-hack_GM431946152.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_off000032ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32BA 25048 bytes
SHA-256: faddece4098eb7e858c138fde3f6458c103327013c46d34295e841211af0ef26
font_01_sfnt_off00006b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6D 3040 bytes
SHA-256: 88825791b477d01e298e214e5620cbb87e7de6c15ffaae46d1f1371055908c03
font_02_sfnt_off000075f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F9 18488 bytes
SHA-256: 01dcb0f2ff627f41b1d4924369c472c3c2df1c4c10fc263e12ce9879fd09d82b

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