Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5746a52200ef0d3…

MALICIOUS

PDF

54.8 KB Created: 2020-10-14 17:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: e77240b83ff4c27c77d1477cc3287041 SHA-1: 6ec90635cf5aecf65f66e2bfd5f347cd9e62a525 SHA-256: e5746a52200ef0d36123290c1ca881c7564d5ac0e4b739a43ee6bd8e9e562c0e
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=special+senses+worksheet+high+school In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f86f67772e34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f86f55877d07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f870dbca26b8.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ligewajinaxi.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/8c3f11ed.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/filosom-lusiwikafese-jerupuxorukoti-novubolifunuw.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/2a5b38eef3430.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/vaxukekiwurefebe.pdfIn PDF document text
    • https://site-1039578.mozfiles.com/files/1039578/ludepofumasukuzafaj.pdfIn PDF document text
    • https://site-1044416.mozfiles.com/files/1044416/83926241388.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9653445.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/4056517.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/665612.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/10610.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279037.pdfIn PDF document text
    • https://site-1041075.mozfiles.com/files/1041075/buvalojelotimab.pdfIn PDF document text
    • https://site-1039693.mozfiles.com/files/1039693/6207925658.pdfIn PDF document text
    • https://site-1039478.mozfiles.com/files/1039478/11042022015.pdfIn PDF document text
    • https://site-1042767.mozfiles.com/files/1042767/39217219997.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1097/2058/files/kazabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5785/4102/files/jixirew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0902/2376/files/wajusugubufenezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/rabedavajodupodunatag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2725/9815/files/nujogi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7309 5244 bytes
SHA-256: 5ce56169ee03e19ba7ddb5424b0359473ee40f14ec7073fec7b2a95f8abdb62a
font_01_sfnt_off000084da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84DA 10280 bytes
SHA-256: 2ca24e07ca28270ca47582e0542f76f88ecd643d868a0bc3a017210f0a7ae330
font_02_sfnt_off0000a843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA843 16568 bytes
SHA-256: 330c1f43a094244b9c76941a29d92a94855ea706052e19aff82307e59904083e
font_03_sfnt_off0000bf0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF0D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361