Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad5efccda21910aa…

MALICIOUS

PDF

81.3 KB Created: 2020-11-21 21:04:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c13777609d24782b2fda9b5e89885784 SHA-1: 1dc9589a44bfb425d702341fbfb8a71bbb266b0c SHA-256: ad5efccda21910aaec379a74b5685f95acb786d9b66cc02f501bf85f3f82790f
154 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged the file with high confidence. The embedded URL is likely intended to trick the user into visiting a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/123?utm_term=g+spot+pdf+book In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393020/normal_5f9f85c7b55a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382952/normal_5f8e5342b9208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5f8aee31aaa6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f87f2c4bbdae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4cff1a7c-f347-4675-beef-c6b75fa281f3/what_young_india_wants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db74a6a8-44a1-42c5-a327-dadb4d6d0b14/54217785393.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/jepavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dd22bf8-3d6c-4000-b7a3-7ad094894c8f/54840413050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0f61fc0-1ab2-4cbd-8377-df85a88624da/the_guest_albert_camus.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/fosulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a885aa26-99a5-4d43-a9d3-93afa7a25176/comprehensive_stress_management_14th_edition_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF218 4448 bytes
SHA-256: e60f109184e54f8dbe6ecc245de3e3ea7e5db9d6ccb464ca6bd81b170e58f9f5
font_01_sfnt_off00010145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10145 12260 bytes
SHA-256: 5c7c66afefb635c237341143093ba83aa92b486a9d65976d2d957992691d2290
font_02_sfnt_off00012a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A89 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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