Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ea9331edd34d0d…

MALICIOUS

PDF

72.8 KB Created: 2021-01-08 09:31:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f3abc044975cdfab0dc0d1dbc48aa323 SHA-1: f571124fd8896ea363fefa62f2170d362a704c4e SHA-256: d4ea9331edd34d0d28c617f9ef7e9d068cadc515fdc0776828c1e30a1404cb3b
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a malicious intent to redirect users to harmful sites. While no scripts were extracted, the structure suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://cctraff.ru/aws?utm_term=sans+and+papyrus+song In PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/taximuvuxo_xobeze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445103/normal_5fc571b0d6801.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/sabarufodij_runedixabubofed_mijukad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482216/normal_5feb773f28abf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f8c857820eb1.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/aedd3495-d4df-48b1-a986-493973a9a7ff/embalming_history_theory_and_practice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15ca6244-d3a3-448a-95d7-2606971dbc2f/gosovubikavududo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5409a249-e623-4176-8942-6984919cd1cb/89224689885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a55d17f7-9d54-4a55-a8fc-022b879a61d5/62068817887.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/lipid_profile_test_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/b._sc_mathematics_books_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3ef278-7712-4bcd-aed9-f31c21d05efc/red_persimmon_nails_beaumont_ca.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_off0000e204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE204 5300 bytes
SHA-256: 6d22017780a6f6e3e2da75869e3b8d9976b84624c7afcd45c46571324f27b411
font_01_sfnt_off0000f418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF418 10324 bytes
SHA-256: add12b903d4fc5a5b07d916228139758f0f4dee51586cd93c3d7704da09e97ed

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