Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d41cf7d50ee2e1c…

MALICIOUS

PDF

82.3 KB Created: 2021-04-06 22:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: eeca803dd6d5c381e04862d2279e4af1 SHA-1: b736c851fea6522c1d06673879333a679c1cc219 SHA-256: 0d41cf7d50ee2e1c47423ded7496b36b4b2a8f9b47f1918860c7b25b2725abb0
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It contains a lure related to 'Xfinity remote codes for element tv' and an embedded URI pointing to a redirector. The primary IOC is the redirector URL, which is likely used to host a phishing page or download a second-stage payload.

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://leonvi.ru/strik?utm_term=xfinity+remote+codes+for+element+tv PDF link annotation
    • http://dimozakebaba.scienceontheweb.net/anatomia_czowieka_adam_bochenek.pdfIn PDF document text
    • http://mini-cam2.club/9091236018c1d6n.pdfIn PDF document text
    • http://muvepifare.mygamesonline.org/the_algebraic_theory_of_quadratic_forms_lam.pdfIn PDF document text
    • http://airbin.top/125910828267t7d1.pdfIn PDF document text
    • http://vakiduweg.mygamesonline.org/mushoku_tensei_light_novel_release_date.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mozutulobiris.onlinewebshop.net/aditivos_alimentarios_conservantes.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/how_champions_think_chapter_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/zukokuxelebe.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/how_to_replace_belt_and_rollers_on_maytag_dryer.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/characteristics_of_autocratic_leadership_style.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/google_map_website_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/81835310051.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/98815443984.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/kenmore_freezer_model_253_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/beer_pong_rules_making_same_cup.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/child_emergency_contact_form_template.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_off000105b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B8 5096 bytes
SHA-256: 8feefde0bdb2c0fda440097539f87ae1bc28f747c3351864d0435257d6fff341
font_01_sfnt_off00011708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11708 10900 bytes
SHA-256: d075f01d468f6cad4a236c8e7f4d1dd332b8b5424d24862cbbc66f8a7d3fbf9c

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