Malicious PDF — malware analysis report

Static analysis result for SHA-256 39b98f0a8d01eec1…

MALICIOUS

PDF

45.4 KB Created: 2021-05-15 14:54:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ecca49373c503f8c22e2f2aba855712d SHA-1: 54943d76f82cf61e0880200420b4e85cd030e39f SHA-256: 39b98f0a8d01eec1b6e6f9c236d70a9d316b5e361d2bb4731c46f91b4e2568f7
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 related to game cheats and free items, indicating a link farm or phishing attempt. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/ear-free-spins-for-coin-master-game-hack PDF link annotation
    • https://vodomery.kiev.ua:443/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/robux-sign_GM431946152.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/free-coins-and-spins-in-coin-master_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B7D 25248 bytes
SHA-256: 44a35ff5aadb6f796dd3d5f3b4d4d2fc79ad256b68529c45384500f0fa8cd948
font_01_sfnt_off0000864a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x864A 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFC 17884 bytes
SHA-256: ecd8870de9922492473d00c4b8bfc3347df30c0c57608714ecf3175ea1d2679c

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