Malicious PDF — malware analysis report

Static analysis result for SHA-256 8709434369f1180d…

MALICIOUS

PDF

44.3 KB Created: 2021-05-13 14:11:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b187df15b4fac09259a13e8c5fc6f5f4 SHA-1: ce405fc624a5fb18b3d0f4c8a999a18e8233455c SHA-256: 8709434369f1180d5e914bdeada00e803a3d2a588d074f30fd6f417879a31d76
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that appear to be related to 'free Robux' or game hacks, a common lure for malicious content. One of the primary links, 'https://netcdn.xyz/app/431946152/websites-that-give-free-robux-game-hack', is flagged as a known malicious redirector. The document body, though partially obfuscated, also contains similar URLs, reinforcing the phishing and redirection attempt. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a 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/websites-that-give-free-robux-game-hack In PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/earn-robux-com_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/robux-money_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/moon-active_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_off00004d13.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D13 25916 bytes
SHA-256: 3921c3ce1dce60e0a051abf4c9e2e2b0b001bfade457233ba48b54a75230dab3
font_01_sfnt_off000088ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88ED 18944 bytes
SHA-256: 78a0fcf68a5d31112d03f33f6a87e59a8dd4ec5e5d54fb5213929ff381de215f

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