Malicious PDF — malware analysis report

Static analysis result for SHA-256 5481589485bd39a2…

MALICIOUS

PDF

53.4 KB Created: 2020-10-08 09:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 16a86eca048759140c44daf1a4426979 SHA-1: fbed2f321a14e6ff73d5348ee8958ff539d5fefd SHA-256: 5481589485bd39a2c1a91df91a1923c410210abea6b4ac3d843bca785d852ec8
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://cctraff.ru/strik?keyword=qualitative+data+analysis+a+methods In PDF document text
    • https://site-1036962.mozfiles.com/files/1036962/wemiw.pdfIn PDF document text
    • https://site-1036829.mozfiles.com/files/1036829/zedasodebiloregepozovame.pdfIn PDF document text
    • https://site-1042770.mozfiles.com/files/1042770/2386144354.pdfIn PDF document text
    • http://files.v-sci.com/uploads/1/3/1/8/131857494/8024872.pdfIn PDF document text
    • http://derarogi.carpetfactoryoutletlondon.com/uploads/1/3/1/4/131407736/lepunigowoxomibaso.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/464bfb52-ee50-4b04-a2e6-747afb4c7efc/teromabetoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ffd6c0-af25-4f9c-a107-998f45f07c44/tokasefazopupifubekun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0b59a8e-5390-4330-88b0-2c6a72f53b0c/71421712258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8106b97f-dae8-436f-916b-067040477512/65591131454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63d14e9e-efb8-4b0d-928c-594dddd90652/ramilozobowinisulib.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_off000093d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93D2 5192 bytes
SHA-256: bf1ffc8744ba67a406b7c140c272997c06428e55f98a01fc55f07efb084e4c75
font_01_sfnt_off0000a563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA563 10428 bytes
SHA-256: 2a5d0ca817d3f7c70fea886cf6c58db949e331a054899e33ba52c545a0d31ae1