PDF malware analysis — malicious · f9b8e2f5bc6c8fc8

MALICIOUS

PDF

40.6 KB Created: 2020-10-31 14:48:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02

MD5: e757c9887d22ad6a0d359f66b6b60acf SHA-1: dbcb44f02c4ccd956ecaa2eb984774518c661a78 SHA-256: f9b8e2f5bc6c8fc8b1b78724baf705cd5eadff2977cea3f1ddf79db7bb268041

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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://cctraff.ru/123?keyword=wwe+2k+android+apk+download In PDF document text
- https://cdn-cms.f-static.net/uploads/4379605/normal_5f8f6ec22816f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4419828/normal_5f9c239e48f6c.pdfIn PDF document text
- https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/bf4044576.pdfIn PDF document text
- https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/3e75a4e696b2f2d.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/gebaxovudofe/65273325373.pdfIn PDF document text
- https://s3.amazonaws.com/zalomi/buvap.pdfIn PDF document text
- https://s3.amazonaws.com/guwutivupudutu/dade_schools_calendar_2019.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/838edb19-a12c-459a-b3f6-52544ea13951/zuxozegixusitibov.pdfIn PDF document text
- https://s3.amazonaws.com/dadupawo/zinesumavetebowimepos.pdfIn PDF document text
- https://s3.amazonaws.com/tetazino/pijafifovepoketidij.pdfIn PDF document text
- https://s3.amazonaws.com/nerugiraxura/zonoduzulodoviwojibuduva.pdfIn PDF document text
- https://s3.amazonaws.com/juzinaramip/rarutegizonumusazukevesus.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.

Filename	Kind	Source	Size
`font_00_sfnt_off000058af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x58AF	5076 bytes
SHA-256: `1bfd758c610e4ee289f4cf6b0a512fc0e366ae881e460cdf15bfcfc33adf0681`
`font_01_sfnt_off00006a22.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A22	15704 bytes
SHA-256: `bef4d041c4b81643d581a4269ff34de59b0ed64ad040589cf1a8094d29a888e3`

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