Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5fcc08b92375ffa…

MALICIOUS

PDF

47.9 KB Created: 2020-11-08 11:45:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f642221db0f37dfb12f7e43d31dc6ec2 SHA-1: 6eece6b6f986fdf472e13ea695498f4cd7cc6222 SHA-256: a5fcc08b92375ffa97e54a73b6a93325ac12a64f46e631e3c2ac551489bfd4ff
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The document body also contains the URL 'https://traffmen.ru/123?keyword=moto+x3m+2+unblocked+66', suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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://traffmen.ru/123?keyword=moto+x3m+2+unblocked+66 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kututel.files.wordpress.com/2020/11/gotewogefipufedula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e4cd69b-50f7-49cc-87e9-0ac56a2a6717/33703442162.pdfIn PDF document text
    • https://kiponofifed.files.wordpress.com/2020/11/ethiopian_spices_and_herbs.pdfIn PDF document text
    • https://pexabubexofo.files.wordpress.com/2020/11/principles_of_physics_10th_edition_solution_manual_wiley.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4a8d59-e6c5-4323-97e9-07a0bf81c057/62423589059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb0630e3-6009-4764-9319-9b22304dbcdf/access_securepak_catalog_ohio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2d46d8-1f6a-4c8c-bff0-2fb20555d1a0/binuzogatuzaxisij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97166ec5-6e0f-49d6-81a6-1d8c05b082f1/element_3d_1.6_crack_download.pdfIn PDF document text
    • https://nuvinifiraf.files.wordpress.com/2020/11/ridulojotel.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/86863544334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7c426c-6469-467e-8ee7-53e98b6e1736/codigos_sagrados_agesta_2017_em_portugues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9ccb31a-adcc-49a4-919b-24ffeef7c759/10956076971.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_off000052f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52F9 13340 bytes
SHA-256: 7f04aa00d3d25c6e75253866aab3cc99f3afa0c047bc5b196e4e6a33412b16c6
font_01_sfnt_off00007e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E73 5328 bytes
SHA-256: 3188f371d85ec90053b04ec1950db00c1d6f554e36ee454f964f13ed3a32b44f
font_02_sfnt_off00009094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9094 10168 bytes
SHA-256: 46662878ac3013d00b508cf272292d430a37caa4c9de4c3df4c93d8ac28f30ba

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