Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab85e20ba472382…

MALICIOUS

PDF

44.8 KB Created: 2021-05-19 12:51:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dc8146fbdddba996b0b4f298d49f7de9 SHA-1: 69cb73af25b0e093993f814859889b591fded0fa SHA-256: fab85e20ba472382a710a4c604850e02c6b4a9d6f500a96501202c0f4aea5e5d
102 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are disguised as PDF files, forming a link farm. The document body and extracted URLs suggest a lure related to game hacks and downloads, indicating an attempt to trick users into visiting malicious sites. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/479516143/minecraft-pe-free-download-ios-game-hack
    • http://depilhome-fr.fr/images/lucky-patcher-coin-master-hack_GM406889139.pdf
    • http://depilhome-fr.fr/images/coin-master-free-spin-ml_GM406889139.pdf
    • http://depilhome-fr.fr/images/free-coin-master-spin-app_GM406889139.pdf
    • http://depilhome-fr.fr/images/how-to-get-free-robux-for-real_GM431946152.pdf
    • http://depilhome-fr.fr/images/coin-master-blogspot_GM406889139.pdf
    • http://depilhome-fr.fr/images/free-robux-app-real_GM431946152.pdf
    • http://depilhome-fr.fr/images/easy-roblox-today_GM431946152.pdf
    • http://depilhome-fr.fr/images/free-robux-just-enter-username-and-password_GM431946152.pdf
    • http://depilhome-fr.fr/images/free-robux-no-verification-or-survey_GM431946152.pdf
    • http://depilhome-fr.fr/images/coin-master-free-spins-link-march-2021_GM406889139.pdf
    • http://depilhome-fr.fr/images/free-robux-hack-no-verification_GM431946152.pdf
    • http://depilhome-fr.fr/images/coin-master-new-link-free-spin_GM406889139.pdf
    • http://depilhome-fr.fr/images/how-to-get-a-lot-of-robux_GM431946152.pdf
    • http://depilhome-fr.fr/images/coin-master-free-spins-cheat-deutsch_GM406889139.pdf
    • http://depilhome-fr.fr/images/freespincoin-masterlinkdownload_GM406889139.pdf
    • http://depilhome-fr.fr/images/coin-master-link-today_GM406889139.pdf
    • http://depilhome-fr.fr/images/coin-master-card-collection-link_GM406889139.pdf
    • http://depilhome-fr.fr/images/free-mods-for-minecraft-pe_GM479516143.pdf
    • http://depilhome-fr.fr/images/roblox-robux-hack_GM431946152.pdf
    • http://depilhome-fr.fr/images/coin-master-free-spin-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048e2.bin
8cac74f1470ab23d79b133c5e8971166e85fd177eda7d310ab5ea994f2576033
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E2 25484 bytes
font_01_sfnt_off0000823c.bin
02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x823C 2912 bytes
font_02_sfnt_off00008c39.bin
9eeecdfb23f1efa52cb61da16af6a6becaf737d5b15e06d56d5bb9cda3007ed5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C39 18444 bytes