Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43db2535fdbf28e…

MALICIOUS

PDF

38.6 KB Created: 2020-09-09 23:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6b86743f8a43d863bbf149074e91dd8c SHA-1: 574f2cee40a9ecb123afa344b10f40bda785037e SHA-256: c43db2535fdbf28e72b2a37c3f152824d47a562c9e8c5a2d7112eb64ca71374d
154 Risk Score

Malware Insights

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

The PDF contains a lure related to 'Bendy and the ink machine apk award' and embeds numerous links, including one to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body and embedded links suggest an attempt to redirect users to malicious content, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ttraff.club/wix?keyword=bendy+and+the+ink+machine+apk+award In PDF document text
    • http://files.jbjclass.com/uploads/1/3/1/4/131410736/jowosesuwijukoj.pdfIn PDF document text
    • http://vopokib.dymondelise.com/uploads/1/3/1/8/131871449/xatobazukev.pdfIn PDF document text
    • http://files.maisonmodulaireautonome.com/uploads/1/3/0/7/130775144/pobajewan_vepavelol_gekalenu_xezax.pdfIn PDF document text
    • http://files.masonjarstudio.ca/uploads/1/3/0/7/130775228/1640829.pdfIn PDF document text
    • http://files.carmenjabaloyes.com/uploads/1/3/1/3/131398253/jobipojor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/rutefamejepoboxorukawug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8583/1070/files/3923083503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7609/1045/files/nimijerobasagebuwep.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6e3131_4963148bd4674594b72c8eb8f6b70124.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e745be_d2c6602a1aab4c7aa3cbab549d36dc57.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/98857b_d2334361a72444dd99de38903b52790f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f08e01_480fb3f84550407b9a4956d32f4f1bb3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2eedf1_ff8456f35c2c47e4b016abb3c95e1221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1774/6070/files/management_of_ameloblastoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2458/7679/files/dogokagilidubujel.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_off00005806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5806 5412 bytes
SHA-256: 0b23deb4c5c85413d5ff7e7914d764e95ff92777d22b72fb78ca31472d213f90
font_01_sfnt_off00006a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5E 10304 bytes
SHA-256: 233761452b23f5a9d3310d46c72ba3b3a50c7d494ee56c6013e1d44356e26207

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