PDF malware analysis — malicious · 2500f27e85deece9

MALICIOUS

PDF

69.7 KB Created: 2020-11-18 10:00:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b09201f6e4c39b755039db819a7bb871 SHA-1: 18a8cf1b4ee4a1688fd1f5ad34257c1407f004f2 SHA-256: 2500f27e85deece98aa9691cbf7a01d637597be9fc8f72a24b6decc8587e7be6

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link to a known malicious redirector, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the embedded URL is the primary indicator of compromise, likely leading to a phishing page or further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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=what+is+direct+approach+in+language+teaching
- https://cdn-cms.f-static.net/uploads/4458618/normal_5fb37167afaa1.pdf
- https://cdn-cms.f-static.net/uploads/4426550/normal_5f98c365e2ae0.pdf
- https://cdn-cms.f-static.net/uploads/4489241/normal_5fac54231a154.pdf
- https://cdn-cms.f-static.net/uploads/4393034/normal_5f9c04ef98f04.pdf
- https://cdn-cms.f-static.net/uploads/4408595/normal_5f983de6784d9.pdf
- https://cdn-cms.f-static.net/uploads/4453115/normal_5fb2d1d942f86.pdf
- https://cdn-cms.f-static.net/uploads/4384318/normal_5fb45c31c80b3.pdf
- https://cdn-cms.f-static.net/uploads/4369663/normal_5f88525d7622f.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/pujinit/nude_figure_skating.pdf
- https://s3.amazonaws.com/roware/57549804625.pdf
- https://s3.amazonaws.com/fowikorejodi/zoology_books_download.pdf
- https://uploads.strikinglycdn.com/files/8d23f4f9-eaef-4473-af7a-9caf7ccd667e/van_isd_transportation.pdf
- https://s3.amazonaws.com/bizamesuwepe/graphic_novel_books.pdf
- https://uploads.strikinglycdn.com/files/7b1c5e07-3455-4e1d-a24a-98c77da34311/64779042398.pdf
- https://s3.amazonaws.com/zupenafud/jepifotunuvom.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d1e3.bin` `6fc05e7c2768cfb7821d22783e0f7fd9badb7538982ee8084c76a2f34795b7be`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1E3	5348 bytes
`font_01_sfnt_off0000e417.bin` `38d4e37f8015be545695fef06bd4f3e12cca97fce82b11fe22661720e3bada50`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE417	10352 bytes

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