Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c52cc52a169d000…

MALICIOUS

PDF

184.4 KB Created: 2020-12-24 03:26:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5efec9329ead445c2aa3e8d6066da2f8 SHA-1: 8ab74a78f89de53af43d0d961410c7d3ea35140d SHA-256: 2c52cc52a169d00087b234281366df52bb885879bbbced7718e5220241df0649
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-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/123?utm_term=ideology+in+friction+corruption+level In PDF document text
    • https://cdn.sqhk.co/jegisizozul/fE3gejj/apprendre__lire_l_arabe_rapidement.pdfIn PDF document text
    • https://cdn.sqhk.co/zijikunu/iSwv8id/bidaxaz.pdfIn PDF document text
    • https://cdn.sqhk.co/goremujoz/Thjhcgi/can_i_have_free_robux_please.pdfIn PDF document text
    • https://cdn.sqhk.co/wemofisejaf/Oagf8tf/90003843965.pdfIn PDF document text
    • https://cdn.sqhk.co/nugutobudan/cifjjid/nasa_solar_observer.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/9giwSjg/43776288840.pdfIn PDF document text
    • https://cdn.sqhk.co/vopufepivipe/hgg78hg/wexirod.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/gurafoga/zamizeguvejug.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/11978321982.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54bb5897-700f-4ff3-a4c2-50cb34a485a1/lemon_chiffon_pie_with_jello.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/atkins_fisicoquimica_9_edicion.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/94319794430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de4b7e2d-76e5-4d28-a3f4-565f44acfdb9/vejorebasasex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76c72951-2a3c-44a4-a4a4-8603bad4e89e/52626521153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2549c853-9681-4411-b127-4645de327172/wofudubazejisuwurizez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0106b3e-182d-407e-84b1-3e38bcd4925a/taxumowobezuj.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_off00029ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29AB8 5032 bytes
SHA-256: f68b2c2d3948e2b8c67408fbd6a32709f2f68b979f6d73ad2839c3fb77c6a5bf
font_01_sfnt_off0002ac00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AC00 11716 bytes
SHA-256: 350c176a8752f2d6f36264362e62ace6ec509a7291625e756e2ec34c0cf7127c

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