Malicious PDF — malware analysis report

Static analysis result for SHA-256 e795844ea4ff74c7…

MALICIOUS

PDF

41.8 KB Created: 2021-05-16 11:06:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d5a31b1fbd718f10c70f739eeb860a62 SHA-1: befc3fecf5f65cab5f94e9d1dcdfd60b61a20974 SHA-256: e795844ea4ff74c718ca6ef807c3eebd4619d53fcd4724267e554b4f5111b576
142 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 point to SEO-optimized PDF files. The presence of a fake CAPTCHA heuristic indicates a social engineering attempt to trick the user into interacting with the document. The document body and extracted URLs suggest lures related to game cheats and free items, aiming to drive users to click malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/431946152/free-executors-for-roblox-game-hack PDF link annotation
    • http://m-sv.net/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://m-sv.net/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://m-sv.net/images/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://m-sv.net/images/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://m-sv.net/images/free-robux-by-watching-ads_GM431946152.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_off0000492f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x492F 24552 bytes
SHA-256: f8ae1ae5f4821ee18752e9573e4b9f48be02adc27ac28a76bdd787e757f063b8
font_01_sfnt_off0000812b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x812B 18192 bytes
SHA-256: 0010e8e9d3b2fa3a2033abb01eb6105ec98c225a2498b2eb90ac9377a6b08ddc

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