Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b85cb909b708789…

MALICIOUS

PDF

74.3 KB Created: 2021-02-25 16:12:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 091dff1e66314033d96e7f73f138f6ba SHA-1: 109f162033f144d5874be619c9b5d2e8009ca691 SHA-256: 8b85cb909b708789a496ce88d12ee5be2092b7cd9240feb8cc1c1f6c484eec61
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/123?utm_term=how+to+find+grants+for+your+nonprofit+organization PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454167/normal_5ffc7e0fae552.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/quote_from_the_little_prince_about_stars.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457839/normal_6003637000874.pdfIn PDF document text
    • http://arthromedro.xyz/tedum4czlg.pdfIn PDF document text
    • http://rent-nout.site/lunadibefezotokofipisobb2w15.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/how_to_work_a_dsc_alarm_system.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/princeton_offense_playbook.pdfIn PDF document text
    • http://aazzzry.space/pamevekabrmbhc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410416/normal_5fd7ea48d83cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366382/normal_5fe3a007c68ce.pdfIn PDF document text
    • http://naturebiolog.fun/analytic_geometry_final_exam_review_answersavxvs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404500/normal_60238eae92a3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374178/normal_5fdd762ad70d5.pdfIn PDF document text
    • http://zoompol.xyz/parallel_coincident_and_intersecting_lines_worksheetf7bze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wejufutaz.onlinewebshop.net/44989420680.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_off0000e534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE534 5384 bytes
SHA-256: 42872ee6c3826a7ffd4c1676ca0f8c8a0a147766b44f13fe780e066c8d0102e0
font_01_sfnt_off0000f7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B8 10920 bytes
SHA-256: dc1008a26089ed947194e9f37c0a6a21424cc3a65862a94e30740603bdfbab9e