Malicious PDF — malware analysis report

Static analysis result for SHA-256 852c031e59c631c4…

MALICIOUS

PDF

45.3 KB Created: 2021-05-11 16:26:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5cf793fd1db15daf9e526195c8819935 SHA-1: 8cde98acd1704311af10ddc618d4ab67e65c671f SHA-256: 852c031e59c631c4b45f9c2f3510291a2965aa1c340eea3df6c00e06fcbd710f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures for game hacks and generators. The embedded URL `https://netcdn.xyz/app/406889139/coin-master-hack-version-2021-free-download-game-hack` is identified as a malicious redirector. The document body text and numerous embedded URLs reinforce the theme of providing free hacks and downloads, which is a common social engineering tactic to drive clicks to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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/406889139/coin-master-hack-version-2021-free-download-game-hack In PDF document text
    • http://www.herricht.at/images/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://www.herricht.at/images/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://www.herricht.at/images/no-robux_GM431946152.pdfIn PDF document text
    • http://www.herricht.at/images/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://www.herricht.at/images/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://www.herricht.at/images/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.herricht.at/images/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.herricht.at/images/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://www.herricht.at/images/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://www.herricht.at/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://www.herricht.at/images/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.herricht.at/images/wurst-client_GM479516143.pdfIn PDF document text
    • http://www.herricht.at/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.herricht.at/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://www.herricht.at/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.herricht.at/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://www.herricht.at/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://www.herricht.at/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://www.herricht.at/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.herricht.at/images/minecraft-bedrock-client_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_003_off00004882.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4882 25376 bytes
SHA-256: ddae28c9e77a925139808d9bcab5372659b903a1f631c5525c1d31fe2e984bfe
font_01_sfnt_off0000828a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828A 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3C 18996 bytes
SHA-256: 92d9309ab276bc9aab9745226f7a970795db6d0c86763d97e38cf379742c13e0

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