Malicious PDF — malware analysis report

Static analysis result for SHA-256 216e67399171dc39…

MALICIOUS

PDF

68.3 KB Created: 2020-12-07 16:58:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9cfed1fe8af6ccde9adef91d95fe49a7 SHA-1: 1908fe5e0d610da2ec0ad6ac77cfe3d699ee4d06 SHA-256: 216e67399171dc391f28cf168fee7c4d73d52612d4fada78a130d488da03eb12
214 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure associated with phishing campaigns. The document body, though partially corrupted, suggests a lure related to a 'Louis Vuitton receipt online'. The presence of multiple external PDF links further indicates a link farm or redirection strategy. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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?utm_term=louis+vuitton+receipt+online In PDF document text
    • https://lowexupunodod.weebly.com/uploads/1/3/4/8/134896298/5666361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373261/normal_5f9bdfd358a1a.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/5a6e8287-21b4-40a5-9af8-6549e25c14a8/cambridge_advanced_learners_dictionary.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4dfad403f5353fdaf152a/t/5fc842904b97230d0506d612/1606959761073/53866652168.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc520ee6609fd0ee7ace750/t/5fc60a191972c46e3c6d8295/1606814234090/nassim_taleb_skin_in_the_game.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc534d7be9b693951270167/t/5fcc59860ab5d62febe86123/1607227783382/88780019621.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdffca4e98326c02d669f6/1606287306707/stellaris_hive_mind_assimilation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2e69a29-8f2c-4ee6-8944-89fa82db1d2e/senior_project_ideas_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa5263a-c1b9-40e1-b84a-10a14ca97be5/pejegetiwamepasatelijitil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9abcea16-d40a-4793-8c33-2b3c39e78160/nursing_care_plan_sepsis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18de7affbf90a66ef1cd7/t/5fca113155485c3109b855fd/1607078193715/5656928409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a22b6c82-a5fd-4ef6-8bc4-33869594f522/x_share_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55e4fc89e1c4b8fdc728a/t/5fccfd92978da30c56ffce92/1607269778645/nipovatomike.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc528a0b8467722f1ef8ef5/t/5fc613b53f75b16643a45268/1606816696463/11722603096.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_off0000cf7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7E 4720 bytes
SHA-256: 450dbe4b0cfc8e3762f8d019b93dcd95e6db84bde1bfed6fedc80cf8b382aa94
font_01_sfnt_off0000dfa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA7 10828 bytes
SHA-256: eb8094700e101a9e744a6e214e39cfdcafcaa0309f1576df72c8b1c10aab6e4c

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