Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0d6e39448c6399…

MALICIOUS

PDF

68.1 KB Created: 2020-11-10 17:45:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7ed3d84a831b6e5a08cf48890ab3462d SHA-1: d79eed2529c4f40a188012c9ade5752189d80e7b SHA-256: 5e0d6e39448c63995ccb6bd9f5987b41a27d58510d6ddea90c5ae3568afd0ee9
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to known malicious redirectors or are part of a link farm designed to manipulate search engine results. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the primary attack pattern involves redirecting users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/strik?keyword=dragon+boat+forum In PDF document text
    • https://kepopuratitub.weebly.com/uploads/1/3/4/3/134378339/nedaxumiw-kafurezabunex.pdfIn PDF document text
    • https://bululirujoko.weebly.com/uploads/1/3/4/4/134487270/juvobelilesi.pdfIn PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/3343969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5f966e6d15588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f96f34f71e79.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9806ec85-7c51-4e33-93c7-bc6728916c3c/50487327069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e22f105-ca78-4bf1-a4e8-d689ca5f9837/1575214888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94afb3ab-4db4-4753-807e-591daef49908/devadibovesibanosikim.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/politics_of_space_exploration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33fdb9d5-4bcf-4d51-8bd1-55f412d05127/93784693226.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/95909831160.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC011 4732 bytes
SHA-256: 24e461bc766f7d6f609f133cf6f2e4ed34b3dbaa5b5c2fe2ddcf7a65f28a5e1f
font_01_sfnt_off0000d006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD006 11128 bytes
SHA-256: ec6e30a37517a668b8c3fddfb118c56e213228ea1346b581035074d218592341
font_02_sfnt_off0000f5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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