Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6abea1eab6c8aa2…

MALICIOUS

PDF

40.1 KB Created: 2020-10-28 00:05:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: af523127c4859a4e6fcf910b7c428ca1 SHA-1: 2a62c4f17ba6f94d1ecbc4e14eeeb74d8845afe5 SHA-256: c6abea1eab6c8aa2bab857a9b611a220fcb34b7ab610f66503b91c146044ea87
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded links designed to redirect users to malicious infrastructure, masquerading as a search result for a school's phone number. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links suggests a link farm or SEO poisoning tactic. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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://ttraff.me/pify?keyword=wauseon+primary+school+phone+number In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f870d0343bcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373520/normal_5f9539b4cf7fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377656/normal_5f8b758d09575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_5f9898bc8dfe9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5f948e0883448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f8701de14338.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_5f8b46233c3b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5f913ea656d28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369520/normal_5f89a65c6ab2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384828/normal_5f8fdc5e25eb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_5f8ce1e442bae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f951ceda385a.pdfIn PDF document text
    • https://pitimonajavigo.weebly.com/uploads/1/3/1/3/131383860/7400132.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/bdc960.pdfIn PDF document text
    • https://jajedasas.weebly.com/uploads/1/3/4/2/134234666/rowasubev.pdfIn PDF document text
    • https://donodofi.weebly.com/uploads/1/3/1/8/131856097/9069355.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/8ac016b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384632/normal_5f92638f39987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5f8b5cafdc565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410217/normal_5f945ce45b587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405930/normal_5f979ba953ce1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/liguwubore/full_bhagavad_gita_in_gujarati_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/dadafopu.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_off00005e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E68 5428 bytes
SHA-256: 395734a8258d3e5fc7e3f557d4cf3247ba2b14b2685c4b0a9c8c1539b6dfdb88
font_01_sfnt_off000070bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70BC 10048 bytes
SHA-256: 82b781fbdf5957affb219d25383ffc4a846d900d30bb4edb4ac4204084b6fc16

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