Malicious PDF — malware analysis report

Static analysis result for SHA-256 daced319e5803b4d…

MALICIOUS

PDF

109.5 KB Created: 2020-11-08 14:00:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c76f86f38c2c8263a07469b1769b3f08 SHA-1: 45d7e934622bc9d51e94c45988ed988316d5e31c SHA-256: daced319e5803b4dbb230a7c9cd7ac73cd619661b3b5b541c6dbf19dc65a349b
96 Risk Score

Malware Insights

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

The PDF document contains a link farm and an embedded URL that points to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier strongly indicated maliciousness, and the PDF structure with numerous external links is characteristic of SEO poisoning or link farm abuse to drive traffic to malicious sites. No scripts were extracted, but the presence of external links is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://traffnew.ru/aws?keyword=terminal+radar+approach+control+facility PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387703/normal_5f93d2dd01060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5fa096deaf06f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403270/normal_5f9573dcbbe87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427273/normal_5fa4c7ae0c4f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459185/normal_5fa49ffdb4384.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372382/normal_5f8abd838664f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420448/normal_5f9916894c863.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f8b38ca30ff5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_5f8f18502f821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5fa36d80e7fc0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://salemug.files.wordpress.com/2020/11/24868242544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0901542d-148b-435a-95d3-d4e6d0ac762e/premo_polymer_clay_color_mixing_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/jokabomaxari.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/gabizagamumarokidatanum.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/cds_2_2019_notification_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57c922dd-12f3-4411-ab00-a184b1593b5f/7676004721.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/nurumulezajulodepi.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_off00017077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17077 5268 bytes
SHA-256: da716dc626ddd85816e01febedd82896414e79a9ac716042ecd7601843722a8a
font_01_sfnt_off00018237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18237 10572 bytes
SHA-256: ea894daa17473db28e765bad9fba4317218c3e7d30afe4fb28057c553eb2e602

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