Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7d9459039c8b170…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 03:06:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b7981763b9aeca065ef6268f8a871d42 SHA-1: aa0aa173cd10b63ad678c1365b9ccdb753366ef8 SHA-256: b7d9459039c8b17098592610900381523a53f56ae9e9d37159eab1ba0e58871d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, disguised as "free generator" or "game hack" lures. The primary redirector URL is http://netcdn.tw/app/479516143/minecraft-bedrock-edition-free-with-java-game-hack. This suggests the document's purpose is to trick users into visiting malicious sites, likely for further exploitation or credential harvesting.

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.tw/app/479516143/minecraft-bedrock-edition-free-with-java-game-hack In PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-get-free-robux-no-human-verification-2021-real_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-free-catalog-items-pastebin_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000316a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316A 22632 bytes
SHA-256: 5e017e392be0e46ea669a005b189929805ab9e410a6ea4eb44f289d6f42ec47e
font_01_sfnt_off00006414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6414 19204 bytes
SHA-256: 90a52e35a77309da72f66e30604d3124f1652836c7ee3d665ece2cb7a8fd5b4e

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