Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac0156084790e68d…

MALICIOUS

PDF

71.5 KB Created: 2021-02-20 07:27:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e1ce1c27e68cf942426f58287a511484 SHA-1: e85fbc138f7969d29d6dc3661aaf5695b8c90d0e SHA-256: ac0156084790e68d5448993b72f2ced9cde9f32843bfec5db95b021abf6e448c
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://crophysi.ru/wix?keyword=kong+skull+island+full+movie+download+in+hindi+dvdvilla In PDF document text
    • https://vinenuji.weebly.com/uploads/1/3/1/4/131453259/690884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408586/normal_601ef44d4ccaa.pdfIn PDF document text
    • https://fuxiwajusefu.weebly.com/uploads/1/3/4/6/134617271/fda37.pdfIn PDF document text
    • https://filavemegu.weebly.com/uploads/1/3/4/8/134883773/magew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406812/normal_60181b5d45274.pdfIn PDF document text
    • https://mesakarune.weebly.com/uploads/1/3/1/3/131380767/02e013a.pdfIn PDF document text
    • https://wexotagupoma.weebly.com/uploads/1/3/2/8/132814474/fufuxiduje-jalajo.pdfIn PDF document text
    • https://susakatevasek.weebly.com/uploads/1/3/4/8/134871092/aa4bc6672c797c.pdfIn PDF document text
    • https://simisodiguguvig.weebly.com/uploads/1/3/5/3/135324772/nadajogi.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/sazixipame/compound_circle_area_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/35350923298.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/tecnologia_e_informatica_colcaro_2019.pdfIn PDF document text
    • http://luxusuriva.epizy.com/www.bpsc.gov.bd_written_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/majesew.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/uc_browser_latest_version_free_filehippo.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_off0000d926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD926 5408 bytes
SHA-256: ca86e913af06fd34424b3edf968f13d00d6bb71b123968f825ceed9ea9d32a36
font_01_sfnt_off0000eb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8B 10692 bytes
SHA-256: 9f1771999086700123b46b6f55794476304e91756d087e21f0f1d3dad24fd8f0

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