Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd0480c0f9d6c2c…

MALICIOUS

PDF

86.0 KB Created: 2021-05-30 00:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6676e938f096ed33452a2b42678bb84a SHA-1: 919a25aae6a85200fb9790691bec2f0f4db4e946 SHA-256: 9dd0480c0f9d6c2c68ad19aa8c4718b30b6dd0b0bee903ee3ec6baad65df210f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with a significant heuristic firing indicating a 'PDF_SEO_LINK_FARM'. One of the primary external URIs points to 'https://kuzutuzo.ru/strik', which is likely a malicious landing page. Although no scripts were explicitly extracted, the PDF structure and the presence of embedded URIs suggest an attempt to redirect the user to a potentially harmful site, possibly for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://kuzutuzo.ru/strik?utm_term=vitamin+that+makes+you+smell+like+maple+syrup PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372702/normal_60150aa50fad5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502188/normal_5ff88614e99a0.pdfIn PDF document text
    • https://tigasuzile.weebly.com/uploads/1/3/1/3/131379741/9356560.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388608/normal_5fceb10f6da94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385216/normal_5fe42fdf83da1.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4368970/normal_60b2377e52dd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374715/normal_5fdd5f0f797cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469349/normal_60600d5790186.pdfIn PDF document text
    • https://winimotewo.weebly.com/uploads/1/3/4/5/134593518/5765800.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4444386/normal_60b0745988866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471081/normal_605601833ef71.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/6ad08792-a1ce-41dc-96bf-a1fc5d15daec/5403257895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/945b3311-c85e-433e-b54c-07af06e8f99d/26_schwinn_sidewinder_womens_mountain_bike_matte_black_pink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7597080f-3c68-482e-a226-a9f738df49a3/introduction_to_mathematics_for_economists.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39430f9-72f5-43b1-aff1-c6c4652beb7a/eotech_512_vs_552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e1c189c-1fd0-4580-83da-e7b69b918013/chucho_el_roto_radionovela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cf6ae4f-6580-4ef0-846a-8b292f50f7b3/wufibawemivuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/decfb265-8b80-403a-a8d9-640e76833312/6518319925.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_off00010a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0F 5188 bytes
SHA-256: e03f02f7aa766418e35c1cf3ab66a43c3a9ffbeff74b2038ea557313cce1fa69
font_01_sfnt_off00011b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B92 15332 bytes
SHA-256: 683421a610a733565f6ccdd083a8f358c1e9c20760fe0f72d22de5a65fc822eb

Open this report in the interactive analyzer, or submit your own file for analysis.