Malicious PDF — malware analysis report

Static analysis result for SHA-256 599e76a397535be4…

MALICIOUS

PDF

41.6 KB Created: 2020-10-10 11:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4672a051f3ceab7180355af1382911b3 SHA-1: fa1670fc79994501eaec1ac35c3ccc7445a41a80 SHA-256: 599e76a397535be4d2895ca637250706cb7541d664b0ef6b11c6ab602b3912df
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/pify?keyword=cashman+casino+cheat+codes In PDF document text
    • http://xuguw.daughtersofcharityunngo.com/uploads/1/3/0/7/130775288/kajalorofit.pdfIn PDF document text
    • http://files.hairfarmsalon.com/uploads/1/3/1/4/131406365/fagibezaxaked_zurinab.pdfIn PDF document text
    • http://pafidafuf.myoakhillchurch.com/uploads/1/3/0/7/130776745/f65231cb4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9accd916-4375-42a4-ba02-20b4a4ff0631/71302964423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dccb930f-b244-42bb-abbb-335a7941ebb0/jitavutarowukomalat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dce08d6-cb89-413b-ac3a-32a888d7cde4/18693698980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fa10932-9123-4b24-aaf1-27c716e4337f/mewuzetalirumizetogifosun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2402/2690/files/chapter_5_test_form_a_geometry_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4816/3738/files/zetojanitatojeted.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6046/1213/files/xesipewigefodubofex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1743/9902/files/postdoc_application_cv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9063/2101/files/62203613561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8693/7248/files/48774522208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9232/7077/files/jokudikapurobilazep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0860/4829/files/71923165947.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_off00006605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6605 4956 bytes
SHA-256: afb7428e819d0e0f523be6e9d70177a99013595d847e5bc8296edd627e4f3734
font_01_sfnt_off000076b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B5 10240 bytes
SHA-256: 489e5e1c0143fa507458c515cb5c364e3bf3d06b20aef6bca26c75e227e62507

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