Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f07b52f3d1ec908…

MALICIOUS

PDF

44.6 KB Created: 2021-06-11 06:43:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3000dd8df714c407da97b82076d889f2 SHA-1: c4354aa98daf119dac293983835ca7b9b220732a SHA-256: 2f07b52f3d1ec908f5793ed909dc1d428086fe3c76ad190618c5974d6ade203e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded links and a specific URL pointing to a potential application download, suggesting a lure for users to download and execute a malicious payload. The presence of a 'download button' heuristic further supports this malicious workflow. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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.
  • 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/roblox-jailbreak-hack-app-game-hack PDF link annotation
    • http://firesafetyservices.biz/images/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/all-working-exploits-free-with-no-key-roblox_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • http://firesafetyservices.biz/images/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/who-tiktok-free-followers_GM835599320.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/roblox-speed-hack-script_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/minecraft-education-edition-free_GM479516143.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
stream_004_off00004ff6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FF6 25228 bytes
SHA-256: 41e82f47968aa1b215f37c9cfd1270564cbc0a51a8f206e7c32f9c208755ce76
font_01_sfnt_off00008a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A95 18644 bytes
SHA-256: 838a98d39fe6ace7efc8b3f30f88d078546d274f83f07a44a834908777d98c4c

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