Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd98f274888aee1…

MALICIOUS

PDF

79.1 KB Created: 2021-02-24 04:26:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 7cd48ad75e7e75418282ab10364d7dd2 SHA-1: 0a489a6b406649bba7187ce0c527f1126d299bc9 SHA-256: 5fd98f274888aee10c1217acaa7ee7168b4909612ab7a860b31c812bc183caaa
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://bologen.ru/123?utm_term=words+for+answer+sheet PDF link annotation
    • https://cdn.sqhk.co/lumolixuwo/bgdjgc1/47780086603.pdfIn PDF document text
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/kexewiboj.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/bhe7VHN/fly_little_bird_fly_poem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_6013866fba8d9.pdfIn PDF document text
    • https://cdn.sqhk.co/xipitufekaru/Siie2kK/jungle_deer_hunting_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490746/normal_602d38d84607a.pdfIn PDF document text
    • https://cdn.sqhk.co/nagigureti/YigHpjd/azamara_club_cruises_contact_number.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469386/normal_5ff9219852028.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/jaVjdgj/xofaxubefodopeg.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/jcgdwSp/pengertian_digitalisasi_era_5._0_society.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379964/normal_60325fb63c1af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479942/normal_5fd64c4ced948.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gabigirinekib.rf.gd/baby_girl_games.pdfIn PDF document text
    • http://sipomivizipe.epizy.com/python_convert_dictionary_keys_to_string.pdfIn PDF document text
    • http://mofibukuzoke.rf.gd/renold_conveyor_chain_design_guide.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_off0000f954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF954 5068 bytes
SHA-256: ec0821f954130361ee88e578f780db5646460fc4a91b98088066bafe84166999
font_01_sfnt_off00010aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA3 11076 bytes
SHA-256: f91ba891cca78ff4d929cdf06eff385a8d9b786801b6b95c7ec021a5a122e65c