Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f39ffe1a282fd5f…

MALICIOUS

PDF

39.4 KB Created: 2021-06-29 13:15:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cff04687a6af3c4aee2ae3a51923b3a0 SHA-1: cab9784962cc1662c900a6fd642b035269a87569 SHA-256: 6f39ffe1a282fd5f7967fb455881c0b16b3fdbff3cd615a48d5dcb0a4ccf9f29
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm or redirection scheme. The document body and extracted URLs indicate a lure related to game hacks and free in-game currency, likely intended to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://netcdn.co/app/431946152/how-long-can-you-get-banned-for-hacking-in-roblox-game-hack PDF link annotation
    • https://www.anders-sofa.com.tw/uploadpic/files/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/free-robux-hack-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/robux-for-roblox-free-no-verification_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/www-free-robux-club_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/if-everything-on-roblox-was-free-part-2_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://www.anders-sofa.com.tw/uploadpic/files/ropa-de-hacker-de-roblox_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3ED6 23544 bytes
SHA-256: e46f4ef353d9a2fd868b1b7ad43122ea2e9f6b585e7f7dfa22b17da81e64b2ad
font_01_sfnt_off0000737e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x737E 19684 bytes
SHA-256: 3868ef6371f4709be3d33ce7578d81bd242408826e22fccae087bd87e2105d87

Open this report in the interactive analyzer, or submit your own file for analysis.