Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1a5495bdb1c615…

MALICIOUS

PDF

41.4 KB Created: 2021-05-10 16:14:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3ea37a7945f13e4965c6a431fa65c5db SHA-1: 5ef23d13a9a142e8d2fafd23309c117f3a488a67 SHA-256: 1d1a5495bdb1c61517d78d63fc95ccc82e961fb021c241764c4d8a71939f9248
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game hacks and generators. The embedded URL `https://netcdn.xyz/app/479516143/minecraft-pocket-edition-free-download-game-hack` is directly associated with the malicious redirector heuristic. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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-pocket-edition-free-download-game-hack In PDF document text
    • http://ce-tsv-nantes.fr/images/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/robux-hack-free-robux_GM431946152.pdfIn 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_off0000409f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x409F 27808 bytes
SHA-256: 2a4229743a957b3ffae50b31664ef5cf4608f6ed9291bb07a913eec291f88a03
font_01_sfnt_off00007f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0E 18616 bytes
SHA-256: 74c3d0dac38db02fae044005a19145e6493ffdefda41676fc7dac63f0b05f007