Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52d6c83dea09d26…

MALICIOUS

PDF

66.0 KB Created: 2021-02-13 14:36:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8cf3c7a7f5d042debafd7e7589f05a5a SHA-1: 17deb8ca850474ff21c426d6d6a386f041d9d743 SHA-256: f52d6c83dea09d265f4e96a21e216774d2e5161777ed745514576da31119c565
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://druttle.ru/wix?keyword=minecraft+banner+letters PDF link annotation
    • https://wezusutuxalik.weebly.com/uploads/1/3/1/6/131637092/1866786.pdfIn PDF document text
    • https://jatufajikovuna.weebly.com/uploads/1/3/4/7/134719937/4372560.pdfIn PDF document text
    • https://duvafoxugijotad.weebly.com/uploads/1/3/5/3/135305538/rebuwezudud.pdfIn PDF document text
    • https://kasewipiliri.weebly.com/uploads/1/3/4/9/134901701/putikozinudavab.pdfIn PDF document text
    • https://cdn.sqhk.co/pategazikiw/hcsebib/gexanusemupadupufo.pdfIn PDF document text
    • https://lorinifufa.weebly.com/uploads/1/3/4/3/134357706/2791731.pdfIn PDF document text
    • http://zotusomadelisok.22web.org/spotify_premium_hack_ios_11.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://komopojanali.rf.gd/hello_love_goodbye_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/42524234518.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/introductory_chemistry_a_foundation_5th_edition_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/afrikaans_love_songs.pdfIn PDF document text
    • http://dobusimosekaba.epizy.com/gifigexirutabewonatadowu.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/makalah_metabolisme_lipid_biokimia.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/11058029977.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_off0000c67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC67E 5020 bytes
SHA-256: 221f3f5bf6696994aab85b0128e1926f86fe9aaaf3995519abaa88ec47b52c78
font_01_sfnt_off0000d7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AA 10364 bytes
SHA-256: 867a891a9551b57da00bc15557daffa5daba7f34a8fd6355d6866ca510b2a80d