Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa18c563728944d…

MALICIOUS

PDF

62.8 KB Created: 2021-02-02 18:47:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6d186b3a9f93e461b4f593518d7218c7 SHA-1: 8373268ea30e290ae56a0d0d397fadedd339436b SHA-256: cfa18c563728944d4c0901c4c011ac525fc1823f44c23d39206556be8d227b0b
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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/wb?keyword=best%20hd%20background%20photos PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389823/normal_6018d2ba18ede.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/ghOL8jg/5084468406.pdfIn PDF document text
    • http://bestita.space/flip_range_2_mod_apkudnwv.pdfIn PDF document text
    • http://forkidsshop.online/baadshah_1999_hd_video_songd8hh9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://takugiwem.rf.gd/vuvomepekalufisugonovob.pdfIn PDF document text
    • http://kababotatage.epizy.com/55059176672.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/serrate_suture_information.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/long_vowel_sounds_worksheets_for_grade_1.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/varicella_vis.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/visual_aids_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/fobadijitopatopokoj.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/carb_cycling_diet_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/kubutowu.pdfIn PDF document text
    • http://nupakavidowux.epizy.com/adelaide_fishing_report_december_2018.pdfIn PDF document text
    • http://ruzawibo.rf.gd/gavibebenigidijukovupap.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_off0000bb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB6C 5556 bytes
SHA-256: 26a85a8d4953f41e97931e16875d0609187ffb71b7ff3a04a4f50215d680d124
font_01_sfnt_off0000ce46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE46 9396 bytes
SHA-256: 8ff3a57dcd43cce72e7a80968f85295a8ef9341acf965ddc8d8d39ba23b190e5