Malicious PDF — malware analysis report

Static analysis result for SHA-256 46213450af4876e8…

MALICIOUS

PDF

63.4 KB Created: 2020-11-29 06:22:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4eb3adc36ece7179fd935572053f56aa SHA-1: 1c36d4b6215e639771f9189294b5c117e8c8c43a SHA-256: 46213450af4876e8150695c71206f9bcf3a6e1f985409fabe34641aa5e6c97d0
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The heuristic firings indicate a malicious redirector and a link farm, suggesting the document's primary purpose is to direct users to potentially harmful external sites. While no scripts were explicitly extracted, the nature of the embedded links and the ML classification strongly suggest malicious intent.

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://traffmen.ru/123?utm_term=big+nate+goes+bananas+free+pdf In PDF document text
    • https://xeforosoxipu.weebly.com/uploads/1/3/4/9/134900432/judup.pdfIn PDF document text
    • https://lusefova.weebly.com/uploads/1/3/4/5/134583673/4484676.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/xefafimofaxeparekuji.pdfIn PDF document text
    • https://kegazesawatodo.weebly.com/uploads/1/3/4/3/134378031/mawigofagor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388428/normal_5f9c7fba30f5b.pdfIn PDF document text
    • https://folesatabija.weebly.com/uploads/1/3/4/4/134441350/fazanewipogawofema.pdfIn PDF document text
    • https://nixagefikaka.weebly.com/uploads/1/3/4/7/134741736/89a4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f8711e307b2c.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/lopazura/wheel_of_fortune_cheats_movie_title.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/synapse_x_cracked_vermillion.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/employee_contact_information_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/gel_electrophoresis_lab_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/essent_rate_finder_plus.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/74101631488.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_off0000ba38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA38 5368 bytes
SHA-256: ef49ad47a5e4b06d8d49b537b484bfc8cbc7bf9e061cbb7f00afdd910d9fd289
font_01_sfnt_off0000cc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC87 11116 bytes
SHA-256: 86f9edb3ab46ebe1b1a4c34d70d37c788d7d619222623f0336b397021dd5552f

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