Malicious PDF — malware analysis report

Static analysis result for SHA-256 117ccfba95a09923…

MALICIOUS

PDF

42.7 KB Created: 2021-05-16 09:43:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3d5c62d0ce2753cda4578d44afa8eca5 SHA-1: 308c3d9158970546df26c780d8f0e7a63d041fd3 SHA-256: 117ccfba95a09923a37fbac1a012fd001ec70996fca98d6b8eb02d28eef5b42f
102 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are SEO-optimized and point to websites offering game cheats and virtual currency. The ML classifier and the PDF link farm heuristic strongly indicate malicious intent, likely to direct users to phishing or malware-hosting sites. While no scripts were explicitly extracted, the nature of the links and the heuristic firings suggest a potential for JavaScript exploitation or a drive-by download scenario.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/free-coin-master-spins-blog-game-hack PDF link annotation
    • http://bunadsmaria.com/images/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bunadsmaria.com/images/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://bunadsmaria.com/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://bunadsmaria.com/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://bunadsmaria.com/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://bunadsmaria.com/images/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://bunadsmaria.com/images/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://bunadsmaria.com/images/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bunadsmaria.com/images/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://bunadsmaria.com/images/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://bunadsmaria.com/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://bunadsmaria.com/images/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://bunadsmaria.com/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bunadsmaria.com/images/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://bunadsmaria.com/images/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://bunadsmaria.com/images/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://bunadsmaria.com/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bunadsmaria.com/images/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://bunadsmaria.com/images/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://bunadsmaria.com/images/coin-master-free-spins-and-coins-group_GM406889139.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
stream_003_off00004984.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4984 25332 bytes
SHA-256: e930f9122156a0d32e5649a4f611c9f4efaa7f0667fda8a9c6213996b09bcaa1
font_01_sfnt_off00008401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8401 18464 bytes
SHA-256: a2c76306a813766f02d16bba13a6176cc917de49c90529db8e6e2ffa1e8149db

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