Malicious PDF — malware analysis report

Static analysis result for SHA-256 3648acfd2c9c2305…

MALICIOUS

PDF

34.1 KB Created: 2021-07-09 12:36:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a7399dd62778382ce2615123528e87ff SHA-1: 0ba67b0ac0f74d2624908fd490760f68a9744c79 SHA-256: 3648acfd2c9c23054ab76a0aac47563eb3d6a9f3ddd4c31db6e20e3f8c1eacb6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple links, including one to 'netcdn.tw', that are designed to lure users into believing they can obtain free in-game currency or hacks for popular games. The presence of a 'free generator / game hack' redirector strongly suggests a phishing or scam attempt. The document's content and embedded URLs indicate a social engineering tactic to drive users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/431946152/roblox-earn-robux-game-hack PDF link annotation
    • http://www.valenciamaids.com/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/2021-free-migrated-acounts-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-clothes-on-roblox-high-school_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-dll-hacks_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/cool-minecraft-hacks_GM479516143.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
font_00_sfnt_off00002fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBC 22304 bytes
SHA-256: d0d8a9a3a1091245947aa9611e4d9bf8f8da2709a9c2e004c6c17f0422ac2619
font_01_sfnt_off0000615a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615A 18628 bytes
SHA-256: 87723f1b5eb861ef54780d0fe18133b649fd057812a840078a66467b2becaec2

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