Malicious PDF — malware analysis report

Static analysis result for SHA-256 92dff90cbf63ff3f…

MALICIOUS

PDF

77.2 KB Created: 2021-02-14 18:00:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 87392be7caad945318c668d6bd5bebf7 SHA-1: 5ccdc9693844eb91543c3d0624ab09f0d30ca5dc SHA-256: 92dff90cbf63ff3f24223e3b2e673476c426003caea2addfc6596d85f48c8256
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/aws?utm_term=online+arabic+to+english+translation+pdf In PDF document text
    • http://chebsvet.ru/definite_and_indefinite_articles_exercises_elementarydtnvk.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/cgiibjb/started_synonym_thesaurus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444102/normal_5ffea45c234df.pdfIn PDF document text
    • https://zinikigi.weebly.com/uploads/1/3/1/4/131453967/ziguvuderi.pdfIn PDF document text
    • http://fortuneocredit.com/singapore_airlines_corporate_informationfl13b.pdfIn PDF document text
    • https://juvikawupuw.weebly.com/uploads/1/3/1/4/131409017/tulujosiwigopat_lasomavoxujo_geledopa.pdfIn PDF document text
    • http://dabuzasomadote.22web.org/nujawojejakusukum.pdfIn PDF document text
    • https://zofigaxukinepir.weebly.com/uploads/1/3/4/2/134235574/75cbc3ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452372/normal_5ff31b2c150ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474978/normal_5fe076b11d266.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/tqMgg1N/among_us_wallpaper_maker.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426407/normal_5ff1e5250cd41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418972/normal_5fc8b53b71704.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/rilunopaluwed.pdfIn PDF document text
    • https://pegupirorig.weebly.com/uploads/1/3/1/4/131406852/biliwisajepit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xosofidevutora.epizy.com/expense_report_template_for_tax_purposes.pdfIn PDF document text
    • http://gedonisezif.epizy.com/hempadur_avantguard_750_datasheet.pdfIn PDF document text
    • http://nudenagazosizav.epizy.com/84734981441.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_off0000ee3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3D 5584 bytes
SHA-256: 3fa4fa822e8b6bfe5cfdde9c56ecd1687f11c414bcd973713c3daae8e182faf3
font_01_sfnt_off00010129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10129 11244 bytes
SHA-256: 55013a56b5db01fb79c687165742fe0f5a448afbdd2fdcae95efc92b16830a0e