Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb83ee06fd116c9…

MALICIOUS

PDF

34.9 KB Created: 2020-08-19 00:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b4e6f19b880883ee6186ed00ad4873d5 SHA-1: 307c8806765b5f7fc450a611837b1498f6d6135d SHA-256: beb83ee06fd116c9327854f433e88b5143adf0d4b57e2f9e04bb924f5880597f
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://ttraff.ru/pify?keyword=levi%2527+s+made+and+crafted+size+guide In PDF document text
    • http://kutap.howlinwolfhounds.com/uploads/1/3/1/6/131606146/7608129.pdfIn PDF document text
    • http://simimap.connectpreschool.com.au/uploads/1/3/1/4/131452821/bb3aae729e.pdfIn PDF document text
    • http://files.theatreguildsimsbury.org/uploads/1/3/1/3/131384113/pufumutisizedal_gasexukaxus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2970/7422/files/nujubotajefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1307/0238/files/93965255444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/timegewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/xijus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/3285536012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/madadagilagutalus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/jenikekesozige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3810/5000/files/pobonexopupagaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0862/9659/files/zepitawinerewususuvuvox.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_off00004241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4241 5392 bytes
SHA-256: 70cb31ddf52898dd3bdc01a66bf4a5b9d6d2ad27353aa6759fbad12d6c06e1fa
font_01_sfnt_off00005495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5495 12200 bytes
SHA-256: a1aeef3a51359ff7cbf9514c4fddb896c51d1962ced91e15722acece1f7b45ee