PDF malware analysis — malicious · 8a4b1778eef20b57

MALICIOUS

PDF

67.9 KB Created: 2021-01-15 07:11:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27

MD5: 5dc493c0021eccbf8b25c8674373a7dc SHA-1: b7f4f0ba14daebea768a887ada470036461c8a75 SHA-256: 8a4b1778eef20b574486797ae14dcf00934e4b1a150ff8fe48f8bbd9d8f16ad1

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, traffking.ru, which is disguised as a job advertisement. This indicates a phishing attempt to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 4

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.
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://traffking.ru/aws?utm_term=business+informatics+jobs+in+australia In PDF document text
- https://cdn.sqhk.co/giganopof/pRtDiaV/sukidavenelirelos.pdfIn PDF document text
- https://site-1172703.mozfiles.com/files/1172703/bengali_to_english_translate_software_download.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4459479/normal_5fcca0cdf2882.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/pubopelej/reference_page_in_apa_format_example.pdfIn PDF document text
- https://s3.amazonaws.com/loranoduzuja/online_editor_adobe.pdfIn PDF document text
- https://s3.amazonaws.com/tojazudibumogab/sw_science_unit_6_relative_dating_worksheet.pdfIn PDF document text
- https://s3.amazonaws.com/davubewu/64937577115.pdfIn PDF document text
- https://s3.amazonaws.com/libeganot/zoniwaje.pdfIn PDF document text
- https://s3.amazonaws.com/pukaridimupo/daily_attendance_sheet_in_excel.pdfIn PDF document text
- https://s3.amazonaws.com/wiwamoxamo/panowixinerik.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_off0000cd3f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD3F	5292 bytes
SHA-256: `1c4598adbb8c9f75426a2aed526dfd904bb3412c550decd31f32a7b92c38bdba`
`font_01_sfnt_off0000df2a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF2A	10588 bytes
SHA-256: `4748354ad8d49116abaa3fe4eff86e1346db46ea7c5e3581e5a722432ff7895e`

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