Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce03410c839489d9…

MALICIOUS

PDF

72.1 KB Created: 2020-11-17 02:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 117cd69866b1f69ecb9ae18961d144b5 SHA-1: e34105db272c80a24464d99a3bf973066fa678a4 SHA-256: ce03410c839489d9e95ca458041c29f776f5121af894a719e19080df4d7da1bf
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and a machine learning classifier. It contains a high number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body appears to be corrupted or obfuscated, preventing a clear understanding of its specific lure, but the presence of a link farm and a malicious redirector strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ggtraff.ru/123?utm_term=cynthia+izaguirre+husband In PDF document text
    • https://rewodudifizaba.weebly.com/uploads/1/3/4/4/134475466/musomomubi_raweduxujejes_zojim.pdfIn PDF document text
    • https://relotozaku.weebly.com/uploads/1/3/4/2/134266658/dafbd7562f.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/1407642.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/xamapebonijos/speedy_lien_search.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a16973e-11a4-4f35-a170-7c96816d7a8e/krunker_io_cheats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b359e48f-d2b6-49c4-b12a-42ce05b507ba/banjo_lesson_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eb995e6-9cbe-41eb-8aef-8cfe7740eac3/naweribug.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/70451178751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94d0ce6c-9468-4288-a6c7-eae82006c14f/26839609209.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/62452759815.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_off0000ddb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB1 5252 bytes
SHA-256: 1ff37fe620a81af83c747890c194d73568bd40350639a3fabfc603b81949b2cc
font_01_sfnt_off0000ef90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF90 10784 bytes
SHA-256: 11abed4dca86bec18d2e8114b34b2fa4bbaeed32522ea9966124dba1e5b18bc7

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