Malicious PDF — malware analysis report

Static analysis result for SHA-256 e542931b20d274c1…

MALICIOUS

PDF

67.6 KB Created: 2021-02-24 13:32:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3ea7952a511bb85edadbaa283899799c SHA-1: cf9bd9e355582d21e7d52bad06b9bbd05baae83a SHA-256: e542931b20d274c135735cfa55b53bad4d2d2f039a02f1670e69903ca9713422
164 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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://baarspo.ru/wb?keyword=georgia%20driver PDF link annotation
    • https://cdn.sqhk.co/muvetowiripa/VgeHcij/retroviruses_are_characterized_by.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456663/normal_5fe284864533a.pdfIn PDF document text
    • https://gebijodefilamoz.weebly.com/uploads/1/3/1/4/131406109/tuvajokidaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/PMjbjff/all_about_history_book_of_ancient_rome.pdfIn PDF document text
    • https://cdn.sqhk.co/fogobewataja/jd4UNvN/tiny_tank_challenges.pdfIn PDF document text
    • https://nopifabuda.weebly.com/uploads/1/3/4/6/134693299/kazomita.pdfIn PDF document text
    • https://baarspo.ru/wb?keyword=georgia%20driver's%20permit%20handbookPDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/flowers_in_the_attic_1987_full_movie_english.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/letojobovesom.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/54299176962.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/64161415906.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/amma_kanakku_tamil_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/21580800669.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/bolugomasiletevevizadiziv.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/choir_uniform_ideas_in_nigeria.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/how_to_report_drug_dealers_anonymously_uk.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_off0000caf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF1 5672 bytes
SHA-256: 1e04ac63029c9a9fb8e256713a7f3a52b0c1efbf55dd3ecac6b59cf37480723b
font_01_sfnt_off0000de1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1D 10440 bytes
SHA-256: 5666d8a51fdc4c711943aa1ba3b037296da5169711438287dc6206712b19ed0e