Malicious PDF — malware analysis report

Static analysis result for SHA-256 f90148521aafa8bc…

MALICIOUS

PDF

72.4 KB Created: 2021-01-26 19:47:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: eae8e053744719d5b828c65a6d10836b SHA-1: 1b052a09f69936ff9ab68ba140a25c5d3e20df20 SHA-256: f90148521aafa8bc6b95e75cd5d3b5da236e5406a3044da60bfa128afadb538a
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=the+intellectual+devotional+book In PDF document text
    • https://static.s123-cdn-static.com/uploads/4490528/normal_5ff09a4930112.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402280/normal_5ffc2de1f2eaf.pdfIn PDF document text
    • http://kodamup.22web.org/kowajemofivexajari.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391898/normal_5fc7b76e4c5fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452193/normal_5fe98dd913851.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390660/normal_5fd04eb73b6cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pivujumurabaf.epizy.com/vcloud_director_ova.pdfIn PDF document text
    • http://jonufinufezo.epizy.com/bam_bam_bam_bholey_tamil_song.pdfIn PDF document text
    • http://mewexudidis.epizy.com/lofavavatabake.pdfIn PDF document text
    • http://raxusitusumulag.rf.gd/abba_harmonium_bajate_the_meme_template.pdfIn PDF document text
    • http://kujujigufa.epizy.com/20884605046.pdfIn PDF document text
    • http://nemebikox.epizy.com/bein_sports_tv_guide_rugby.pdfIn PDF document text
    • http://ruxurosagogaru.epizy.com/golang_template_join_array.pdfIn PDF document text
    • http://gebibem.epizy.com/wimasepelamagoguxizimu.pdfIn PDF document text
    • http://gegokuberil.rf.gd/37521964093.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_off0000e011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE011 4968 bytes
SHA-256: 1557e5a0222ac7df1a3dcbd3575efcbf366e855010aed2c742ab311d95532d29
font_01_sfnt_off0000f0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FD 10488 bytes
SHA-256: 45dd9ce5f894b8a735873c7d1910ba0947804f813978726947f71c67b4d57cbd