Malicious PDF — malware analysis report

Static analysis result for SHA-256 4534c6dc593b5271…

MALICIOUS

PDF

77.9 KB Created: 2021-01-17 07:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e38ca7df4430a47dea116fe68b570431 SHA-1: 7ed645971a99fffbbe0f5998cf0e41839e10daa5 SHA-256: 4534c6dc593b52713435520bd02c0e67e310877715997ea16cdfeccecf022954
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a link to a known malicious redirector URL, which is a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of a malicious URL and the file's classification as a phishing trojan suggest it's designed to lead the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/123?utm_term=boston+market+nutrition+chart In PDF document text
    • https://static.s123-cdn-static.com/uploads/4410954/normal_5fe52d15b2a86.pdfIn PDF document text
    • https://site-1168401.mozfiles.com/files/1168401/rise_of_kingdoms_guide_francais.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418574/normal_5fded6bc4874f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408582/normal_5f96253e5815f.pdfIn PDF document text
    • https://site-1168172.mozfiles.com/files/1168172/iot_project_report_format.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488581/normal_5feff3b371de5.pdfIn PDF document text
    • https://cdn.sqhk.co/lebereme/idpEROP/beast_boy_shub_horror_games_granny_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425913/normal_5ffd4965261be.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/gjzWqjj/election_watch_2020_npr.pdfIn PDF document text
    • https://site-1168242.mozfiles.com/files/1168242/93020425096.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f9347f226fe0.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/retisovojor/essential_academic_vocabulary_answer_key_chapter_4.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44C 5120 bytes
SHA-256: 10f6250832b014c5db4a521d0d10698266aa3b7f549a358f0c040e61bf4c186f
font_01_sfnt_off0001058c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058C 10900 bytes
SHA-256: f26f952872495acca0250f03042bb5ed60ddf7fc3fa7f827b73433a626e090be

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