Malicious PDF — malware analysis report

Static analysis result for SHA-256 6259bea6cf88d5a4…

MALICIOUS

PDF

62.3 KB Created: 2020-11-21 01:59:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 43da877b99837e836d4bd110a47c9dde SHA-1: 75742d1d377dcbf1c6a9bcb7786b2b26207fa7e5 SHA-256: 6259bea6cf88d5a43945c14838e1eb4485a5455c61c116e5bbd37a8f9c793c25
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a sales advertisement. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded malicious URL suggest it's designed to lead the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://cctraff.ru/123?utm_term=rc+battery+chargers+for+sale In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372723/normal_5f8b80c46b612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389830/normal_5f9a606c8cc60.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/xakapudakadu/89179850589.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/chemical_actinometer.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/27163423554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36c634e7-c8fa-4beb-a1f3-ef3ad5f3e1c2/53487849385.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/nuropikagalakenizefon.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/45488116490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a0fa43-b87d-4bf1-ba89-7aa225303328/45953922418.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/lemogulujelalaj.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/requirement_elicitation_and_analysis_in_software_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/asthma_control_test_nz.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_off0000b778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB778 5392 bytes
SHA-256: 6e43a9c79d7cdac3af83c4150ee181aa815c86ee6ceea2e6a2aae0b656564a91
font_01_sfnt_off0000c9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DB 10348 bytes
SHA-256: 9ef4eb87e40fa9e339cf90d198292efb107b0903e1d8eea8a9d58ef73ee3eeb5

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