Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1bcb406aed5a94…

MALICIOUS

PDF

67.7 KB Created: 2020-12-21 09:05:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e86551cf2fb92afcd2aa6bc5aeb00d29 SHA-1: 649ac7904909770c7f4235a2555fd3db8ac3697c SHA-256: 4e1bcb406aed5a9441ac342e83c1714c4bc2be3c6ab2c1c6c81926e6c63b562e
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/wb?keyword=new%20york%20city%20fc%20merchandise%20store In PDF document text
    • https://sijetuso.weebly.com/uploads/1/3/4/4/134499475/ede05dacf.pdfIn PDF document text
    • https://sobaxijuxoje.weebly.com/uploads/1/3/4/2/134235367/zofogegude-jakupuperevuge-fusujuni-fuvilevako.pdfIn PDF document text
    • https://romuxejis.weebly.com/uploads/1/3/4/8/134887308/5fff2fb68fd.pdfIn PDF document text
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/gepinepez_josuniragon_domataxidu_sulegefimubedo.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/f3b6ff3f-a3b6-4042-a850-615e5552ccff/zitotogusivotat.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/dry_september_by_william_faulkner_short_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b01caf2e-8f7e-4f8d-9569-071dbecc5d31/16399937032.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/afterburner_4._4._0_beta_15.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb33a511-f8ef-4157-9bea-356d78e7858e/punawimekopora.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf4895db6f322e656e3e16/t/5fd696c1dca22152604a2ec4/1607898818642/xorigotimonarafojodud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/152fa7af-a39c-4a7f-b453-e183d80ceca3/broadway_jr_seussical_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e85c0900-4093-4074-8e69-c4159b4fced4/volunteer_position_description.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eac55bcb0228a2828fa5/t/5fcf1f5964290b1c3dd0adf4/1607409497154/loop_taxi_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d166d3c-30c5-4194-be2b-7962143272cb/11430239170.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd745bcb0228a2824d01/t/5fc120b0cb3e0f577177b399/1606492337049/earth_the_operators_manual_quizlet.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_off0000ca4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4F 5456 bytes
SHA-256: 5fbaff844e5c53d71bf85b991106330c1aef709d16e79b08b4a3bf1452436e40
font_01_sfnt_off0000dcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD5 10956 bytes
SHA-256: bee56bb0c66a68cff295e8c39090368a2238c5f76aee3ba2fde5168425bd1712