Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68906ab92b74d38…

MALICIOUS

PDF

63.0 KB Created: 2021-02-18 20:04:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d95aaead98b6663d5c495dda3b84b223 SHA-1: 751aade69cb60410feb7ae7d1f0199a964d5c3fd SHA-256: d68906ab92b74d3892ab2d6bd55e5be788335ea0e509b3f4ae51f20f4510db8f
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=piedmont+elementary+charleston+wv In PDF document text
    • https://puwedogomep.weebly.com/uploads/1/3/1/3/131382223/58fe474b704.pdfIn PDF document text
    • http://interstart.online/72545845159t63rn.pdfIn PDF document text
    • http://trellos.fun/examen_de_manejo_en_new_jersey_gratilz7xw.pdfIn PDF document text
    • http://toppiksnack.xyz/jozivupunigomafuvysmf.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/24144470191ody6r.pdfIn PDF document text
    • https://subilitukufune.weebly.com/uploads/1/3/4/6/134629352/fcd36bc43fb5.pdfIn PDF document text
    • http://alexandreablog.com/code_metal_slug_3_download087c1.pdfIn PDF document text
    • http://erogan24.website/ge_spectra_electric_oven_not_heatingff070.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wekumut.epizy.com/zozadisadegakedodilo.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/blank_tee_shirt_template_front_and_back.pdfIn PDF document text
    • http://jodewejuwuw.epizy.com/baby_blue_satin_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/employee_non_disclosure_agreement_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/math_calculator_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/nifupi.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/19063660871.pdfIn PDF document text
    • http://daxotumolurotaw.rf.gd/the_dark_knight_returns_comic.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_off0000ba9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9B 5432 bytes
SHA-256: c6c8eab5604f79b02d14bb0914130c01d453b8c38fd2de96c31a75dd47e6d14e
font_01_sfnt_off0000ccfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFE 9960 bytes
SHA-256: 241515a89ceb67d2985d0f7d987542e42e0851c62bf0043315b93967054b244d