Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc371b5bde81d928…

MALICIOUS

PDF

62.5 KB Created: 2020-11-30 02:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 689050138a801d30960b904c0cb91ad8 SHA-1: d5443b046ff65451d6c6ca538210f04ad0a0412e SHA-256: cc371b5bde81d928b99901afd3d65823ac79024560df34a009ff56b1f4b17983
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 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=glencoe+exploring+our+world+textbook+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411493/normal_5fbae3ac0b1ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403563/normal_5fab0c38a62e1.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/94d80f44-d592-4507-9504-11457c60a917/datagrid_wpf_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b2ec9e7-decd-4a5f-b23a-ef086aec209c/i_know_that_my_redeemer_liveth.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/kikewil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d86686-ab0a-4a08-bce8-5f41dc7fbce5/tegus.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/venewumusenupot.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/virowuzevikowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a044c75-3175-4e68-9cde-9ece306c6392/lidoxibajojexigive.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/92942232333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46d1539a-b17b-4567-9b66-6a4dc90821a0/putigixerozowava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a72e99e-d0e7-4746-8c77-ade4de74ac4a/bulifegotase.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/fubara.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_off0000b81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB81C 5328 bytes
SHA-256: e5a932d5e1100e8436c421b7038897c0f5631a652bebaba493a7515d679093fd
font_01_sfnt_off0000ca6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6B 10056 bytes
SHA-256: 22bb44668d756e46f6fbaa552566f89e9f18fa830c17af099447d0b484a2ec09

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