Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4f2ce3e33fc24d3…

MALICIOUS

PDF

66.8 KB Created: 2020-12-04 13:30:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 33531f9756d1f9075e38c6e03c25fea5 SHA-1: 9d79755136e54321de667b9a560007f9225c58d0 SHA-256: e4f2ce3e33fc24d3a4165a1c13e9efb2ca42e5e946cd8e32d414a770067892ec
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://traffmen.ru/aws?utm_term=switch+case+string+java+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421612/normal_5fa7bf2610646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388165/normal_5faa29420c6b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392218/normal_5f9ad6aa585f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_5f8f0873266ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448547/normal_5fa618428bf27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_5f8a268c2c44b.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/a48aa609-933f-448f-bebd-76e605b190aa/72160043922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18770413-799c-4fdd-a55f-1a923d4d997f/92957041634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28cff572-19a8-485b-bd98-bff42391bc1f/simone_browne_dark_matters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0be6735-68f0-4394-991e-7e8d4d1c1ace/7265847638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c7c439b-9da0-4385-9ba7-ee7f7892245f/zevamorumadividira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0761f3c4-d8ab-44a0-b116-336aedd2c627/toy_day_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2cec94-35ca-4112-be5f-d8c1ba8f775a/bugoduv.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_off0000bc68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC68 5500 bytes
SHA-256: 9060efe248115801bef6bf37ef729b6ed658f4d653b1d192501edd85bde58cd7
font_01_sfnt_off0000cf31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF31 15692 bytes
SHA-256: 559e80ed81099a5605ed7bdcdb3528654909b45c3f8fa9a354f74a94513e5fe5

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