Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc207f7dd12a5545…

MALICIOUS

PDF

48.9 KB Created: 2021-06-11 03:10:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9b6a3cd7e355462737ea780681a83f09 SHA-1: 410aae899153af7a7b2de35602e9825f427f0789 SHA-256: dc207f7dd12a5545aa9555537cea33052faef9c44cbf8b6e9bb640bb8d6b4556
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on them, likely leading to malicious websites. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the document body content indicate a focus on game-related hacks and account access. The presence of many external links suggests a link farm or SEO poisoning tactic to distribute malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 6

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/hack-roblox-accounts-2021-game-hack PDF link annotation
    • http://pia2000.net/images/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://pia2000.net/images/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/free-robux-no-playing-games-or-human-verification_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/code-robux-free_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/how-to-hack-into-your-lost-roblox-account_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://pia2000.net/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/what-is-e-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/free-robux-link-in-description_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-hack-version-2021-free-download_GM406889139.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_004_off0000522d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x522D 25760 bytes
SHA-256: 64c404c58c11ca3784bd73144df7126388ecc24a0da0f3b5adaa68475e406ceb
font_01_sfnt_off00008dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DFB 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA3 18828 bytes
SHA-256: 4a6a7081bcaf4e10d733bdfcd61bd1bc1d2383d6f7e309257551f50f0e9fd082

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