Malicious PDF — malware analysis report

Static analysis result for SHA-256 9363608a1a068573…

MALICIOUS

PDF

41.6 KB Created: 2021-05-16 18:37:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 57c9cf74ab003014d56cf067d7c198ae SHA-1: 3274e466a1f4fdda0f8086f49295feb41a889f70 SHA-256: 9363608a1a068573bcaeaa4a6f26e08afc28c17ce96ad623d06c931e322944d1
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are identified as malicious redirectors or part of a link farm. The document body, though partially corrupted, contains a primary URL that aligns with the 'free generator / game hack' lure. This suggests the PDF's primary function is to redirect users to potentially malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/get-robux-today-game-hack In PDF document text
    • http://dopheide.be/images/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • http://dopheide.be/images/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://dopheide.be/images/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/free-spins-on-coin-master-app_GM406889139.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_off0000459e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x459E 25212 bytes
SHA-256: 33c9e551e2a7810b1bc827cb0ebfc0776f968dc207f05d40102a62812f5a8cf5
font_01_sfnt_off00007f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F20 18536 bytes
SHA-256: 52f9c859b3f332441204d5c114ca3069b0f0b255dc0376a71d348f06f556bd46

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