Malicious PDF — malware analysis report

Static analysis result for SHA-256 f10375b13655629f…

MALICIOUS

PDF

32.7 KB Created: 2020-10-30 14:03:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: db00b9cd11e36e8bc0fb2f8510e4e261 SHA-1: 1900bfdab2eb546a3759fa35f31784cf4260a704 SHA-256: f10375b13655629f610e8a0451972fd0d0d679941f46f948a991e9d24079f2fe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The document body, though partially obfuscated, includes URLs that are likely intended to lead the user to malicious content. This behavior is consistent with phishing or SEO poisoning tactics designed to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://gettraff.ru/strik?keyword=legend+of+zelda+parallel+worlds+snes+rom In PDF document text
    • https://bopiwode.weebly.com/uploads/1/3/4/3/134367631/faforu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367271/normal_5f878d2861e48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f98c12204d15.pdfIn PDF document text
    • https://xuguzopagar.weebly.com/uploads/1/3/4/4/134490213/5905287.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/6488f771bce02.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/1/0483/2663/9780/files/vedetadanopawidid.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/intel_xeon_x3440_vs_i7_860.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/55686995684.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/xebikiposis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8930f70-54f6-4428-864a-21ccf76a9ac6/51455262065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42e3c317-6407-459f-84c4-c0aca6144f8c/phantom_tollbooth_chapter_15_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2680/6446/files/group_theory_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5382/4172/files/ibc_2018_construction_types.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4980/2664/files/foribozekekazik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8772/2144/files/7512868263.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_off0000426f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x426F 5444 bytes
SHA-256: 302526e68bdf836c3923173544b3539c691b59a90d138cb5c9be53fdf4d5b9e9
font_01_sfnt_off00005508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5508 9684 bytes
SHA-256: d44852391808e5807df69b44a458ba36e2cc488e56d69672f66a307c0ca0f1e1

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