Malicious PDF — malware analysis report

Static analysis result for SHA-256 23792c0867ae4abd…

MALICIOUS

PDF

70.8 KB Created: 2021-02-18 11:30:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5bd28564b48184c1f93d48e3ea0fb1d2 SHA-1: 612c414f22fc8cc06c53af23284a6b98fa8d0ed8 SHA-256: 23792c0867ae4abde85b3cf806018e18e7d6dbbc7fe6875cc5fb63e8178fdf17
136 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
  • 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/123?utm_term=mr+coffee+maker+bvmc-sjx33gt PDF link annotation
    • http://fly-drive.online/pinnacle_studio_18_user_guide9qlna.pdfIn PDF document text
    • http://detonic-romania.website/deep_learning_with_rbfm25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421474/normal_5fd2e6f8521b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386609/normal_600907a570254.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/wokesabisevo/muridoxigijogetaw.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/96180008258.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/guideline_ada_2019.pdfIn PDF document text
    • http://favuzokusom.rf.gd/psnc_follow_up_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/77990018792.pdfIn PDF document text
    • http://vozapubivazub.rf.gd/35117979854.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/wolisewuf.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/mastering_vmware_vsphere_6.7.pdfIn PDF document text
    • http://siberasule.rf.gd/fb_video_er_using_link.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/baltimore_county_zip_code_map.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/96601969196.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_off0000d79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79B 5780 bytes
SHA-256: 90cd419b3aac6e8fbdb1533d8522beddfb8086c630152dc1a9cbd2b94ce85e1b
font_01_sfnt_off0000eb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5F 10388 bytes
SHA-256: 8ff21d88e49e644b850b9624bc0070d29f204f005cdade83252b764fdb304c7c