Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b41d51c5e8c7f3…

MALICIOUS

PDF

34.8 KB Created: 2020-10-09 11:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: cb4b687caf3b3120efb6e10cdae7e854 SHA-1: fd8ce899705ec2bfd120e597a26f1f477284b797 SHA-256: 65b41d51c5e8c7f3d03cb771cfb9ae05ddc3f38d7b04b77ea5dea14a95cabfca
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ttraff.link/pify?keyword=social+psychology+david+myers+12th+edition+pdf In PDF document text
    • http://files.cellar27furnitureco.com/uploads/1/3/0/7/130738841/muxusovikinipap.pdfIn PDF document text
    • http://sadek.steelecanyonathleticboosters.com/uploads/1/3/1/1/131163927/tojovijimetubono.pdfIn PDF document text
    • http://wabutuzof.andoanderson.com/uploads/1/3/1/3/131379594/gijewolederanik_kufukoki_vufopamere.pdfIn PDF document text
    • https://site-1037069.mozfiles.com/files/1037069/xubet.pdfIn PDF document text
    • https://site-1036698.mozfiles.com/files/1036698/dujatulujibobixa.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/3a3cfa69-6797-4efd-a73a-deb48f10362f/vativumemaxog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5509aa33-812e-4bb0-8b2c-4f6cfdae47d0/90934498970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49783fab-0bb4-4b0a-aafa-8da8b5ca0957/15740132360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0eb82c0-4299-4397-8c52-3994f4c0014e/xijipasenagekilabejizonik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9027/9077/files/wifim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7731/2407/files/establishment_of_the_ics_modular_organization_is_the_responsibility_of_the_blank.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4814 6016 bytes
SHA-256: fe6a5dcca194876e13c0183bcf4face3ee09a0b9a8ca04459a9e733891c15436
font_01_sfnt_off00005c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C76 10004 bytes
SHA-256: 52b6bae2809cdf93f92e3a5ef8b37b43bf999eef13559dde5b68d54074b323e7