Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd3e7bdef5a7ffd…

MALICIOUS

PDF

41.5 KB Created: 2020-10-14 09:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5641e85b4f2d713a94c0a0315f52817c SHA-1: 24ce3a6bc9dda7d64b16871a799a39c008397a6a SHA-256: 1bd3e7bdef5a7ffdeb68885647116784d2ced96253318137b222de71420d1d50
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=installation+instructions+for+nest+thermostat In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3355978.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8709547.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/9232432.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3029889.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/dae546e6-de44-4ea1-96b1-0da21a869df2/9531894628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ce7494f-d87f-472e-87c6-4a323ba5e2ac/21057674581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e35c565-e9ae-4fc6-8ff7-4652459ed95c/12560250115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a630feb-ea7e-4393-8678-49624e858320/28052780045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8048/1958/files/angela_carter_short_story.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/reinventing_government_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9445/1370/files/mixed_operations_with_integers_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1886/0190/files/achilles_2_unblocked_weebly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4571/7669/files/77462026939.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_off00006402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6402 5060 bytes
SHA-256: ad6ef823407e6a660da4c2a11ad9762e82e7c87eb762e5d551e54dc1fe7fc38b
font_01_sfnt_off00007501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7501 10616 bytes
SHA-256: b0c5a8f15209419e285197b7e6251b96a9441fd248bf73b0da0598a68bd37e0d

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