Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b38f6d5fe258ef…

MALICIOUS

PDF

72.9 KB Created: 2021-03-02 16:35:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f717aff430e5b00188975bf41a946a2d SHA-1: c271d6ba25d72ccad152bf08b11a839f48804af0 SHA-256: c0b38f6d5fe258effc1328916f4d71309273962fbabe278ae5d1ffb403a7357b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/123?utm_term=vermeer%2527s+hat+book PDF link annotation
    • https://cdn.sqhk.co/wixexozesila/h3tkBji/shortcut_key_to_open_command_prompt_as_administrator.pdfIn PDF document text
    • https://cdn.sqhk.co/tevimuwijile/ianpxie/49311244886.pdfIn PDF document text
    • https://jobeluraxofedir.weebly.com/uploads/1/3/4/3/134317239/660ff61ebb.pdfIn PDF document text
    • https://liroxinumapidaz.weebly.com/uploads/1/3/5/3/135348088/kaxizegepi.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/MUggibC/72346064627.pdfIn PDF document text
    • https://cdn.sqhk.co/lubometusoz/4XghiFv/sago_mini_music_box.pdfIn PDF document text
    • https://cdn.sqhk.co/makulowujip/bTwjbzi/94312763494.pdfIn PDF document text
    • https://cdn.sqhk.co/bawusipa/gjJjazo/my_dream_house_design_project.pdfIn PDF document text
    • https://cdn.sqhk.co/lalamiteliw/qjjhaig/16486157103.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/INHibif/tasutebezuwurukajoter.pdfIn PDF document text
    • https://cdn.sqhk.co/sapugelezuf/jiQ6gcA/pilevatidoridozowaguv.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/gchmOgh/7230868875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446036/normal_6018440c54f0b.pdfIn PDF document text
    • https://cdn.sqhk.co/voxobidivel/9Y4kjd9/world_women_s_hockey_championship_2020_tickets.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/wudibirewuduto/zafafebulalavabutope.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_off0000e185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE185 5096 bytes
SHA-256: 7f756a556aea1027b1cbb4cebb14d63eca04dec35288f8603233828222196942
font_01_sfnt_off0000f2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B6 10816 bytes
SHA-256: b66637e03e88057c933676c1c23b983d7d18da89b1147ed0a207981c78a98ac3