Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a209acfbb21ec86…

MALICIOUS

PDF

66.5 KB Created: 2021-02-24 17:36:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ed20f1d000d9f81024ad13a763b99c7c SHA-1: ab350a5f61e5bbd911236b34d833f35edcd0b2e4 SHA-256: 4a209acfbb21ec860982696078ca9ddcfac86df028d3e31788089e398bee4d48
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://yafferge.ru/wix?keyword=sweater+gamefowl+for+sale+in+georgia In PDF document text
    • http://wawepeb.22web.org/lovog.pdfIn PDF document text
    • https://lupemofuxuxutuj.weebly.com/uploads/1/3/1/3/131383332/pagad.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/xomudufe/world_art_history_timeline.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/biponib.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/salsa_casera_herdez_informacion_nutricional.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/injury_report_rams_vs_steelers.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/will_xiaomi_mi_a2_get_android_10.pdfIn PDF document text
    • http://bedekopezedegej.rf.gd/if_function_in_excel_2013.pdfIn PDF document text
    • http://jokubizipapazor.epizy.com/legislatively_mandated_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/can_i_use_jolen_bleach_on_my_face.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/dodopalat.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/rozuva.pdfIn PDF document text
    • http://zapofekeba.rf.gd/hostgator_wordpress_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/practical_clinical_skills_ekg_reference_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/video_show_editor_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/background_funny_music.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_off0000c8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8AF 5284 bytes
SHA-256: d2eb3accb57f93d562a09cf956346ae531fcd07d3ea104f9fc809571324a17bf
font_01_sfnt_off0000daa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA2 10212 bytes
SHA-256: 5cea77935ed451bf4f261d29c8e1d0a332d0b2cd4cbac9032fe375579a908218