Malicious PDF — malware analysis report

Static analysis result for SHA-256 8acbb1c73f1f6bd5…

MALICIOUS

PDF

44.7 KB Created: 2021-05-11 20:35:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 115d6b21db7d5eb5f645114f6d1d18c5 SHA-1: 0aa4e7e267bd35422ce2ca3efe1e218347756705 SHA-256: 8acbb1c73f1f6bd5a6b8b84aa42b4606c8b4898c2062e88bf08ea6b854ce6b73
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, one of which, 'https://netcdn.xyz/app/431946152/free-roblox-followers-generator-game-hack', is identified as a malicious redirector. The document body and heuristics suggest a lure for game-related cheats or generators, likely leading to a phishing or malware download site. No scripts were extracted, but the presence of malicious links and the lure indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/free-roblox-followers-generator-game-hack In PDF document text
    • https://www.anagoria.com/images/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • https://www.anagoria.com/images/free-robux-co_GM431946152.pdfIn PDF document text
    • https://www.anagoria.com/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://www.anagoria.com/images/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://www.anagoria.com/images/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.anagoria.com/images/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • https://www.anagoria.com/images/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • https://www.anagoria.com/images/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.anagoria.com/images/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.anagoria.com/images/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • https://www.anagoria.com/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.anagoria.com/images/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • https://www.anagoria.com/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.anagoria.com/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.anagoria.com/images/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.anagoria.com/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://www.anagoria.com/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.anagoria.com/images/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://www.anagoria.com/images/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.anagoria.com/images/easy-way-to-get-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_off00004a85.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A85 28540 bytes
SHA-256: 707881b20cc77fffc7692577ca802c6ebcb4480d8004c118441c74918225d554
font_01_sfnt_off00008bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB3 18444 bytes
SHA-256: 85a3bc75163aa5cb550fcd7f623674911054c132152be1c6daf8752df38f0070

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