Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe03ef0ac35593ec…

MALICIOUS

PDF

67.6 KB Created: 2021-02-23 22:57:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8d352597e8a89f7e7318220b833adf3e SHA-1: 57e6b3a45d0036c89b5bb18178b71ac0a03aa3ba SHA-256: fe03ef0ac35593ecb6edfe39b8c3484d4242f6e81785596274d6bd0d3c536f5a
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=odyssey+book+5+summary+shmoop In PDF document text
    • https://benokonafininu.weebly.com/uploads/1/3/4/6/134606635/12268e0.pdfIn PDF document text
    • http://wdd13.ru/flag_removal_counselinghr0q5.pdfIn PDF document text
    • http://nujanafuvasas.iblogger.org/6161885581.pdfIn PDF document text
    • http://wopebexe.66ghz.com/9128036495.pdfIn PDF document text
    • http://vesimawamom.66ghz.com/jenofi.pdfIn PDF document text
    • https://tobejisexin.weebly.com/uploads/1/3/1/4/131454505/2274376.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/fodose/adecco_salary_guide_malaysia.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/wugutupugutulexurol.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/bengali_descriptive_writing_book.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/hcna_certification_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/uc_browser_latest_apk_app.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/checklist_template_for_project_planning.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/81506046586.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_off0000cd3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3A 5624 bytes
SHA-256: c8071084bd57e82ef941a41a2259cca8018f143e3b6f9ac8160290a0a52c79d2
font_01_sfnt_off0000e031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE031 9908 bytes
SHA-256: a7802b1c15d8f3a2504c65842bf41836c91ffc2f3289e7fd17bf3e4d82bfa2b1