Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc28fd9158ee3ba…

MALICIOUS

PDF

69.4 KB Created: 2021-01-29 23:46:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3546fd9d7c597f3e384e4dfdba573339 SHA-1: 71fcee84fc299ad5b186bbd3e56eed532c2b1138 SHA-256: 9dc28fd9158ee3ba56911a8935894ab329f2f7131163f70ebf29d6c02f0d7e73
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://seumenha.ru/wb?keyword=the%20tiger%20rising%20discussion%20questions PDF link annotation
    • https://cdn.sqhk.co/gefimiwotux/qvhfiGK/sw_passive_color_strip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485149/normal_5fef83e523326.pdfIn PDF document text
    • http://lofitner.buzz/woxofumaz0khz6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403282/normal_600be73301deb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473656/normal_5fcc25f7809ab.pdfIn PDF document text
    • http://opit.space/94580169921m03qa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382948/normal_5fcb3c7d59bfe.pdfIn PDF document text
    • https://cdn.sqhk.co/novujarogoga/rhdieuO/behind_the_music_twisted_sister.pdfIn PDF document text
    • http://virnet77.ru/9905933081g53oe.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/aihgfhd/amazon_prime_video_cost_student.pdfIn PDF document text
    • http://avbox.org/77701186082wqw9c.pdfIn PDF document text
    • http://unreguezff.rest/502026879684fb79.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/rukotidelowerumenizo.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/wiputedawab.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/vomul.pdfIn PDF document text
    • http://pasabepudibupe.epizy.com/militaguforugakamuw.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/agency_agreement_draft_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/oreiller_memoire_de_forme.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_off0000d50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50A 5032 bytes
SHA-256: 61b1161f7565acb4c8771ecaa8990441f30559c1fcec4087eb4769fd035e7e24
font_01_sfnt_off0000e61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61F 10056 bytes
SHA-256: 3af75beeb81e888357076e994cdc4c5e681e4890b643ffeadaa0833c8686ab42