Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93c795b34e7d290…

MALICIOUS

PDF

70.3 KB Created: 2021-03-01 19:42:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: cfdab90a79bde9261d8c3cc732ce9b6a SHA-1: 0a6b170e4142f81f0e42210946750cad3a57672a SHA-256: b93c795b34e7d2903d4c931520ebd8c22268d79dc67276f0be73b642064ddaf5
196 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
  • 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/123?utm_term=amplificador+fender+mustang+i+v2+20w PDF link annotation
    • https://wamazuwo.weebly.com/uploads/1/3/1/3/131380988/f5ce2a112a3.pdfIn PDF document text
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/3de568e4c6.pdfIn PDF document text
    • https://pegepujime.weebly.com/uploads/1/3/1/4/131453637/podadapogepejowakem.pdfIn PDF document text
    • https://wafewukim.weebly.com/uploads/1/3/5/3/135399971/2024568.pdfIn PDF document text
    • https://cdn.sqhk.co/dogilijesiwu/hbqr2CS/61260242853.pdfIn PDF document text
    • https://bunivuwavimi.weebly.com/uploads/1/3/4/7/134706582/kobapujozomorupuka.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/nufidibodudulad/understandable_have_a_great_day_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/83160194545.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/wow_havoc_dh_pvp_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/61939014144.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/myanmar_subtitle_srt_file.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/30544594035.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/1351650818.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/78497952209.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/2010_buick_lacrosse_navigation_system_manual.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_off0000d417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD417 5892 bytes
SHA-256: 740454a3b6c026ac8b80deefaa8d1f59fafab8afcd798cbf0f2d0400d018c829
font_01_sfnt_off0000e821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE821 10956 bytes
SHA-256: 123ea42c286425df269738cab2006fda8d41fd15994b463581d9af07e922b3ff