Malicious PDF — malware analysis report

Static analysis result for SHA-256 85496f2d0bd447a1…

MALICIOUS

PDF

43.1 KB Created: 2020-10-03 03:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7f1e4bf0b24da5a7b69cfd4b62e7e8c9 SHA-1: 04bf155cffe1997553b99f319dad97a72b99722e SHA-256: 85496f2d0bd447a101ad5343cd67899f20a55178ec43f72cbee562a5e7ba5ddb
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/pify?keyword=mass+of+a+joyful+heart+sheet+music In PDF document text
    • http://files.psychedeliclens.com/uploads/1/3/2/6/132696325/zorogi.pdfIn PDF document text
    • http://files.handhwindowcleaning.com/uploads/1/3/1/8/131871952/889015a2d31d08f.pdfIn PDF document text
    • http://files.peterdimuro.com/uploads/1/3/0/8/130874520/6840248.pdfIn PDF document text
    • http://files.purlieulandscapes.com/uploads/1/3/1/3/131383694/a3390.pdfIn PDF document text
    • https://site-1037175.mozfiles.com/files/1037175/wakefubozofude.pdfIn PDF document text
    • https://site-1038796.mozfiles.com/files/1038796/fejaxenajasakufurafu.pdfIn PDF document text
    • https://site-1039510.mozfiles.com/files/1039510/xilizorobos.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/1/0488/0823/1077/files/lilac_brown_bolete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7428/0855/files/78455121439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5833/9733/files/louisville_ky_escorts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7009/5011/files/step_up_3_cast_where_are_they_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4980f1b8-48f2-4172-a913-b9594f76a4fb/3466768218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91e5865c-5fcd-4a2f-bd8f-4600889a824b/gugadixud.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_off00005e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E50 5304 bytes
SHA-256: 0e88760a5ca35ddf2c1df9b9c96571bdf6549b2c660b84d4813a93fcc8e347ce
font_01_sfnt_off0000704a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x704A 14592 bytes
SHA-256: 8ebd8d3f7bed73721d3be5b9eaa225a92144039346de0cb62642134dae9de680