Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f91bbd0755ac5f…

MALICIOUS

PDF

36.8 KB Created: 2020-10-07 13:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 85a1802ed9252e8b9e26e69fbf0b7529 SHA-1: 937f01e80641d17944ec474de8c0e3fd58aa4ebe SHA-256: e2f91bbd0755ac5f0bbc044df6ceffc5bba4bee38ec52a7376a4158f334201e8
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/strik?keyword=call+of+duty+modern+warfare+3+indir+vip In PDF document text
    • http://duzovaxup.clrennieart.com/uploads/1/3/0/7/130740510/83517.pdfIn PDF document text
    • http://bajedak.philologia178.org/uploads/1/3/1/1/131163991/9159741.pdfIn PDF document text
    • http://dilikeje.pstechgroup.org/uploads/1/3/0/7/130739240/82b1b1f26019.pdfIn PDF document text
    • http://soxiv.sylviashanahan1.com/uploads/1/3/1/0/131071041/4654233.pdfIn PDF document text
    • http://fipadubut.harleyerdman.com/uploads/1/3/1/4/131437490/zilivogupivijuket.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/1/0436/1977/8720/files/xuwozopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9063/2101/files/67992722272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/totowemaxamas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1085/3534/files/read_write_learner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/1274/3080/files/kupin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2817/5265/files/kolaranemew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2483/6764/files/vujobibikam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5231/5036/files/bofefemutufuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0366/0453/files/1990481765.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_off00004be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BE3 5332 bytes
SHA-256: 75484502bf2eaa5beab9e5debdd8b3ac9ac0af71b00701c5e7b75628766a5864
font_01_sfnt_off00005e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E11 12712 bytes
SHA-256: dcf491f8ab4dd18c294b3ef098eebdb4b25d4484b416fb937235a721f79da005