PDF malware analysis — malicious · 4d9cccdf43a52fc1

MALICIOUS

PDF

66.2 KB Created: 2020-12-24 14:15:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02

MD5: ec2bba85b4233a8afcd081b7f0dd5b2a SHA-1: c2e49f3ce6e8e9313c3c32befc16b296f5718645 SHA-256: 4d9cccdf43a52fc12a268e2ea521593cc238c3124a9beba219706ebbf6d1b5bf

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and 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 0.9995

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://cctraff.ru/123?utm_term=area+code+205+location In PDF document text
- https://cdn-cms.f-static.net/uploads/4383334/normal_5f99e247c5bd0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393364/normal_5f8eb572d2d56.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448341/normal_5fb260bd13dd4.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4414489/normal_5fca66347c672.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4456387/normal_5fa14cb4dbf2b.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/wizedumi/21198090049.pdfIn PDF document text
- https://s3.amazonaws.com/nonipesikiri/kaabil_full_movie_720p_hevc.pdfIn PDF document text
- https://s3.amazonaws.com/lupuvogotog/aaliyah_t_shirt.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b771fbb6-aa56-4af2-9889-a35a5a32f3a1/mckelvie_intermediate_school_lunch_menu.pdfIn PDF document text
- https://s3.amazonaws.com/banula/uc_browser_handler_mod_apk.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_off0000c7b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC7B2	5144 bytes
SHA-256: `d8128a97a52333541332e5328639f016fb95c3cacccbacbaeda38f70b47ebad8`
`font_01_sfnt_off0000d941.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD941	10376 bytes
SHA-256: `f28764e8d9ac68fe087702b6887701a3300dafd2582082f1192ae44839a00efd`

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