Malicious PDF — malware analysis report

Static analysis result for SHA-256 3457e822d96a7cd9…

MALICIOUS

PDF

54.1 KB Created: 2020-10-25 21:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 88a8e0cf98f6c86cb27889e2767f1cae SHA-1: 7f3509b191d26f52b0c40e9875cdd53f7d8588f5 SHA-256: 3457e822d96a7cd95ce164aff6e4c9de8a82b312213b731f6cd7ed3b6eea7167
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://cctraff.ru/aws?keyword=10th+english+synonyms+and+antonyms+list+pdf In PDF document text
    • https://dikekivex.weebly.com/uploads/1/3/0/7/130775400/6284700.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/wuverobazab.pdfIn PDF document text
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/jirewapul_vilirafaxapu_rimofewekuw.pdfIn PDF document text
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/444b88.pdfIn PDF document text
    • https://sonilotosoj.weebly.com/uploads/1/3/1/3/131379329/9027042.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wewebunovemerifabo.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00009425.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00009425.bin)
    • https://s3.amazonaws.com/fidefofudi/model_code_of_judicial_conduct.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/javevunufotuxuximajagek.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/17062360363.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/dieta_keto_menu_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/gebewiti.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/latekajomedawikoxonufomaz.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/alter_ego_1_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/6634984791.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/define_acid_rain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db2f52ec-e86a-4096-940c-af1b3168d641/dejapupimewodalezipir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/866d1f07-d9bf-4001-8c31-3e16fec2d388/ntc_110.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 extracted file (font_00_sfnt_off00009425.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9425 5560 bytes
SHA-256: 0de565347ce049e2cf8cfc5b4ff53be71f7ccea96ec10b919ba2b05657188329
font_01_sfnt_off0000a6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6EE 10832 bytes
SHA-256: b5ef476e0af77409c822c79bd0977c9087385c0f19b5d769cb1078ab8e716ce7

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