Malicious PDF — malware analysis report

Static analysis result for SHA-256 73f0e6c55dee9f59…

MALICIOUS

PDF

70.2 KB Created: 2021-02-04 00:15:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a8ecec0c9132529bcc8ffb759408f0b0 SHA-1: 16f014812e279b640dc5754f9ecceac32125005d SHA-256: 73f0e6c55dee9f5926de7d95c140fe1e5e10faecfb9a0b5006c10124b103a6e3
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://jottigo.ru/aws?utm_term=facebook+messenger+pop+up+ads+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4493195/normal_5ffa6b33ba9be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366639/normal_5ff91953b9bd9.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/cTig1hb/world_apartment_horror_review.pdfIn PDF document text
    • https://tupenozisi.weebly.com/uploads/1/3/4/0/134012303/kejavasedidisev-wekiverovi-wigaresixaw-wemudidekaxexaw.pdfIn PDF document text
    • https://cdn.sqhk.co/zubuwebofe/eKqghhJ/litujebigetep.pdfIn PDF document text
    • https://cdn.sqhk.co/tokotuxajif/uf8jgzG/82613689618.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447915/normal_60146638e4c33.pdfIn PDF document text
    • https://tiluzapibijodok.weebly.com/uploads/1/3/4/2/134265907/c04990.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/UYdIibu/strategic_management_book.pdfIn PDF document text
    • http://zamuxodub.22web.org/80294422295.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449422/normal_5fc9e278523e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366639/normal_5fee18703386a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386834/normal_5fd612da3f127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466368/normal_601b04f72f549.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://konivad.epizy.com/xopijosadezelutivekun.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_off0000d47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47D 5520 bytes
SHA-256: 12189141242d21369542a9860332d97775090d757d64421b777e959a2dc33342
font_01_sfnt_off0000e725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE725 10696 bytes
SHA-256: 6475f8686abc3b50c9afdf3398fe8b61c35e0d645b129481601e50a2d420e88b