Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a358481af73252…

MALICIOUS

PDF

46.5 KB Created: 2021-05-14 05:06:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5cc6273c2724854342884c22e2ba791c SHA-1: c476d8b7fc962d25c650d7ecbd417c7472f0f80a SHA-256: a3a358481af732523c007e6c5af35f61f3cde9d4813522f11f36356044e6c3c4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a primary URL pointing to a "Coin Master Mod Version" download, suggesting a lure for potentially unwanted or malicious software. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many of which are also related to game cheats or downloads, reinforcing the phishing or scam nature of the document. While no scripts were explicitly extracted, the presence of external links and the ML classifier's high confidence score suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/coin-master-mod-version-free-download-ios-game-hack
    • https://itv-grabungen.de/images/coin-and-spin_GM406889139.pdf
    • https://itv-grabungen.de/images/coin-master-free-spins-2021-generator_GM406889139.pdf
    • https://itv-grabungen.de/images/how-to-get-free-spins-in-coin-master_GM406889139.pdf
    • https://itv-grabungen.de/images/100-free-spins-coin-master-link_GM406889139.pdf
    • https://itv-grabungen.de/images/coin-master-free-coins-and-spins-link-2021_GM406889139.pdf
    • https://itv-grabungen.de/images/free-robux-that-actually-works_GM431946152.pdf
    • https://itv-grabungen.de/images/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • https://itv-grabungen.de/images/twitter-coin-master-free-spins_GM406889139.pdf
    • https://itv-grabungen.de/images/coin-master-free-gift-links-2021_GM406889139.pdf
    • https://itv-grabungen.de/images/abd-roblox_GM431946152.pdf
    • https://itv-grabungen.de/images/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdf
    • https://itv-grabungen.de/images/free-robux-hack-generator_GM431946152.pdf
    • https://itv-grabungen.de/images/mobihack-roblox-hack_GM431946152.pdf
    • https://itv-grabungen.de/images/coin-master-free-chip_GM406889139.pdf
    • https://itv-grabungen.de/images/how-to-get-free-robux-on-iphone_GM431946152.pdf
    • https://itv-grabungen.de/images/free-robux-download_GM431946152.pdf
    • https://itv-grabungen.de/images/coinmaster-spins_GM406889139.pdf
    • https://itv-grabungen.de/images/is-there-a-free-version-of-minecraft_GM479516143.pdf
    • https://itv-grabungen.de/images/www-coinmaster_GM406889139.pdf
    • https://itv-grabungen.de/images/google-coin-master-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a2b.bin
d4a63812d98c24e24d33716ac634f9d10aa421a09eaff572845132e44842350a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A2B 27812 bytes
font_01_sfnt_off0000895b.bin
fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
pdf-font-stream PDF embedded font (sfnt) at offset 0x895B 2812 bytes
font_02_sfnt_off000092fc.bin
e21c1a46e414e08f32ecd5b141a565b40ef5ebf0a551a42677bec20a6ad54cab
pdf-font-stream PDF embedded font (sfnt) at offset 0x92FC 18424 bytes