Malicious PDF — malware analysis report

Static analysis result for SHA-256 b80d6c2afb5a3f54…

MALICIOUS

PDF

41.6 KB Created: 2020-10-25 19:15:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 403a7d03b3b5dbb3344e9a804c244e6b SHA-1: 84d35744ad96e54bf2629f3da1f9b6191df1b339 SHA-256: b80d6c2afb5a3f54961307260ba8cca39c900b2d0cb81848e36e32e63afa8a80
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/123?keyword=animal+worksheets+4th+grade In PDF document text
    • https://gakuwalexutibok.weebly.com/uploads/1/3/4/3/134332976/969715.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/843e560d01.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/70a25ce.pdfIn PDF document text
    • https://gujodoludota.weebly.com/uploads/1/3/2/6/132681740/6434373.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/susopuzupure/august_monthly_calendar.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/benakuwepiw.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/monofovomivojizax.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/bv_ramana_higher_engineering_mathematics_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7918/1500/files/emmerson_mnangagwa_biography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/6989/1494/files/20399055138.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/fosavetunewevisebuzadoj.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/xebenedad.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/febuzoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/pelugivasisikedow.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_off000062f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F3 5472 bytes
SHA-256: 2a99fa2b9d244c61d6cba17eb61d9bd922c1a27f8805d9fbf7209b9d77c9912e
font_01_sfnt_off0000756c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x756C 10736 bytes
SHA-256: 271e2bd91d59363a4678171d2cec4ed592dc7d9206eff733395c1536e75e4373