Malicious PDF — malware analysis report

Static analysis result for SHA-256 4251d66cc751959a…

MALICIOUS

PDF

45.1 KB Created: 2020-10-27 17:02:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-16
MD5: e90a42e37aa746e0cdca9cc98fea84a4 SHA-1: 8a936e6a62f470d633dd8c7a63214be42a4342e4 SHA-256: 4251d66cc751959a6c7a569176eda56d64fb3806e88b3889fb35ffd90a7d1d8b
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ggtraff.ru/wb?keyword=decode%20base64%20pdf%20online In PDF document text
    • https://netulomite.weebly.com/uploads/1/3/2/8/132814473/wuzozudezepepemuj.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/f9007.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/sijalekikewajuj.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/wibisijakaweban.pdfIn PDF document text
    • https://dovasuseburipir.weebly.com/uploads/1/3/4/3/134394860/lebiwefo.pdfIn PDF document text
    • https://pesodubebugi.weebly.com/uploads/1/3/4/2/134234841/dofizupewesarur_mevamugapuno.pdfIn PDF document text
    • https://josadezabo.weebly.com/uploads/1/3/4/4/134490641/vifudulapukadog.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/jenibokogu-pizejut.pdfIn PDF document text
    • https://wuwenivavubujer.weebly.com/uploads/1/3/1/4/131437756/3483085.pdfIn PDF document text
    • https://zevejekigo.weebly.com/uploads/1/3/4/3/134374512/9494360.pdfIn PDF document text
    • https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/kuluvigoxi.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/gavexilatuvitaz/simuguwid.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/credit_suisse_global_wealth_report_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/84516264419.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/spreadsheet_formulas_excel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/7223594527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0343/6446/files/physical_education_ia_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7125/8278/files/osteoblast_and_osteoclast.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/1986/2694/files/26903679368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3495/7762/files/6838464312.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/autoria_y_participacion_derecho_penal_peruano.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/bi_rads_atlas.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/public_administration_notes_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/57351770452.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_off00006b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B07 5436 bytes
SHA-256: ccc4d254072c7135be288c92d690c5f8d9a312d409f84a75ebdca83429d5cb0c
font_01_sfnt_off00007d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D92 12144 bytes
SHA-256: b36347bb4b8135e1928a631715d98c90d45fdb5c5c33e17d114f10db19553e3d

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