Malicious PDF — malware analysis report

Static analysis result for SHA-256 c219939fa8dee3c4…

MALICIOUS

PDF

65.0 KB Created: 2020-11-18 07:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 46d39a1e6b9e928fcb3d19f16c602d98 SHA-1: 93cfaf3eefc39ad9e9b1d15706ddfdac48f17c62 SHA-256: c219939fa8dee3c44b5219f7479dc4b5512bf627ab991d88f4825914d03ebecd
154 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 ClamAV and 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 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=suma+de+fracciones+mixtas+y+propias In PDF document text
    • https://cdn-cms.f-static.net/uploads/4443824/normal_5fb2bcdb455f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423155/normal_5f9720707124f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_5f95eff3976ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454184/normal_5fa9322b29198.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f87611b494c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5f8ea22d5a102.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f89f6ed84b50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5f881b2d8c610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377924/normal_5fa94c6c90e41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387411/normal_5f98acb4d3240.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_5fa7e4235e5d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383467/normal_5f9f254dc269a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480399/normal_5fad4044da6d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412183/normal_5f9e701dd5489.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/e79977d8-dc1a-4e88-80a0-ab8fef152bde/succeeding_in_business_with_microsof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee8c889-796f-4c3a-952b-1a73510c488f/daniel_yeager_dds.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_off0000c101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC101 5544 bytes
SHA-256: 573dbf97b76a897aa1669cb54b05c7ee685682cd9a113aaec4201f73a4c0ea23
font_01_sfnt_off0000d3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D2 10240 bytes
SHA-256: 2a3eff96d8d86e8389853872690df17b30dbddea312d4fa1900edb3312e6edd5

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