Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2f71aa856b73cf…

MALICIOUS

PDF

33.5 KB Created: 2021-06-27 05:57:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 93ea1d429aff573143e5a7d84e38964a SHA-1: a99e9e11ef8c74e2b1284060f9694a38c8362de2 SHA-256: 3a2f71aa856b73cf2a296d2b96258c98f177aba2f178aa46d71aaff3c1570795
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free in-game items for popular games to entice users. It contains multiple links, including one pointing to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/roblox-free-shoulder-accessories-game-hack. The document body and embedded URLs suggest a phishing or scam attempt designed to lead users to potentially malicious websites. No scripts were extracted from this sample.

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 http://netcdn.co/app/431946152/roblox-free-shoulder-accessories-game-hack In PDF document text
    • https://anshingtek.com.tw/image/data/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/como-hackear-cuenta-de-roblox-facil_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/vip-roblox-free_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/free-draw-2-roblox-script_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/how-to-get-free-robux-on-laptop_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/rbxdemon_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
font_00_sfnt_off00002da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA0 21664 bytes
SHA-256: a43dca7b25718cbd4d4fc6a64a7a1d9f7f8722cec0881d44a97b12dc900e2632
font_01_sfnt_off00005d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4B 19252 bytes
SHA-256: 572cddf348062b6a6269bdd9859fbbd9e17e29549e49886200b21a1ca8dc1328

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