Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1702ca15e112a6…

MALICIOUS

PDF

66.7 KB Created: 2021-03-01 20:43:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f9df117283154250f9dc2ca5a0a28928 SHA-1: 5bf3e35431a27c9a039cec433403cc3a397c8539 SHA-256: ad1702ca15e112a6f83c410e400bbbb86d4f26123bac76ae0e971f94932e1724
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/award?keyword=manual+de+gramatica+portuguesa+pdf PDF link annotation
    • https://junimadegerozo.weebly.com/uploads/1/3/4/0/134096607/wugufajid-gowakajozipam-dakip.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/4176878.pdfIn PDF document text
    • https://mazerobuwi.weebly.com/uploads/1/3/1/3/131398334/746225.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/eR7SKjh/bipuligokibisupafagezo.pdfIn PDF document text
    • https://xaroduzorosu.weebly.com/uploads/1/3/1/3/131398324/74231d6cf55.pdfIn PDF document text
    • https://nutolaje.weebly.com/uploads/1/3/4/5/134596366/fc1a43.pdfIn PDF document text
    • https://tulivugid.weebly.com/uploads/1/3/4/6/134607321/e055c868.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/ncaa_football_scouting_report.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/tiziwazejapope.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/wumat.pdfIn PDF document text
    • http://firuxafuxu.rf.gd/kindle_book_format.pdfIn PDF document text
    • http://zakuvusebaj.epizy.com/building_materials_and_construction_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/company_logo_png.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/mufuno.pdfIn PDF document text
    • http://pimudovi.epizy.com/80356704302.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/37229960259.pdfIn PDF document text
    • http://luvoximod.epizy.com/wexupub.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/rovajodexabomut.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_off0000c8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E7 5480 bytes
SHA-256: b9b82317e0882453d3e7514313d1cb5c233a53df7b04625e9014bc5e726e46b6
font_01_sfnt_off0000db86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB86 10108 bytes
SHA-256: 782685354c42c3b6b3e049b0ec72cb9e70fefb5455f47f90593e6d5cb2d3bbdf

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