Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e24779c1e39a1b2…

MALICIOUS

PDF

48.7 KB Created: 2020-11-06 06:43:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 0ed7ea83cbda576811a9041a3ba51ce4 SHA-1: 4e563ceb3347747a21e699d5fe5687da8d9a233e SHA-256: 5e24779c1e39a1b2fec3c0703a1befa52dda336c4e75f787e45d2d2283645b19
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://trafficel.ru/aws?keyword=rosario+a+la+virgen+maria+rosa+mistica PDF link annotation
    • https://suxomosiwe.weebly.com/uploads/1/3/4/3/134350922/8bafed79035d.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/2288239.pdfIn PDF document text
    • https://rofofomigedug.weebly.com/uploads/1/3/4/4/134486696/wuzives.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc469d24-4eee-4278-ab8e-2518ec09760a/xaxizoxetoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f3642c-7aae-452b-8f40-8b8bfb230646/pefuxitulimuganefigiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/120db9cf-a3c3-4b7f-9b00-08596b471f4f/fleeing_the_complex_stickman_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efea07d2-f882-4c6d-a279-ca057f08932b/lumuwane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbeff81b-cbe9-46f4-afca-7d5dcb9576a5/wegopuxawadebe.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/falling_into_place_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e08f823a-a5a4-4dac-b744-20c351fb6469/vudazulelu.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/28124985858.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8E 5188 bytes
SHA-256: f5c206784a6a1cc562d503a7afbec09c6c683abbea83ea198a70962454bc59f0
font_01_sfnt_off00007e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2D 10336 bytes
SHA-256: 00dce25f638cf31f5a8eaf51f05de4a041c5ccd21c92c013ee64fe7d7e6a399a
font_02_sfnt_off0000a16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA16B 16028 bytes
SHA-256: 0bae8649ba252bcfab81cb8324cfe1737d73e47191b507e117e6d0858e0066a8

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