PDF malware analysis — malicious · 2ef45cdf2fd0751d

MALICIOUS

PDF

108.9 KB Created: 2020-11-25 19:17:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 4cae4fa4d23bbc35b46f7189c4edf1e4 SHA-1: 771a4746f37866b7afb355e8e8a2100b7260f565 SHA-256: 2ef45cdf2fd0751d327f84788a86d36dba5b9d31f25d2f6ae0d96c6ff1875f02

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, forming a link farm. One of the primary links redirects to known malicious infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV also flagged this file as malicious, supporting the assessment of a malicious PDF.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

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.
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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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/strik?utm_term=gurps+free+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4421629/normal_5fa7cac15a034.pdfIn PDF document text
- https://xuzojawuwakobo.weebly.com/uploads/1/3/4/3/134312069/2816756.pdfIn PDF document text
- https://bevatisaxotel.weebly.com/uploads/1/3/4/3/134378436/bifusogewixefu.pdfIn PDF document text
- https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/kowomewozan.pdfIn PDF document text
- https://tuwijojax.weebly.com/uploads/1/3/4/4/134477229/ganogaji_jeravoza.pdfIn PDF document text
- https://raserigu.weebly.com/uploads/1/3/4/7/134725151/4187235.pdfIn PDF document text
- https://kudumegowejo.weebly.com/uploads/1/3/4/2/134266354/weturu-latikuwesejanub.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/b51d763a-44f5-4d77-8b1d-75709d39e8da/t_harv_eker_millionaire_mind.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/16b3a17f-5f8e-4c7b-a292-b2a390447eac/dupeninokinefumibut.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bfd5dcce-1161-4a5b-b745-7897b5fea18c/proform_630ds_ifit.pdfIn PDF document text
- https://s3.amazonaws.com/gotenukevepunin/latest_kodi_apk_for_firestick.pdfIn PDF document text
- https://s3.amazonaws.com/juvosi/77956349305.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fd85a6ff-5b29-4eb5-bf98-5c73b7da0a86/54560720554.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3a1f5092-5a05-485f-94c3-9cf8d25b8112/99848886013.pdfIn PDF document text
- https://s3.amazonaws.com/memul/prefixes_and_suffixes_worksheets_grade_6.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00014836.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14836	4964 bytes
SHA-256: `c4841b699863389e4e415a265fff9db6ff494be42dd97c4554ee07965a4cde26`
`font_01_sfnt_off000159b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x159B1	4824 bytes
SHA-256: `8745bc061bfa8932dbd6ec71bda930fbf98f20111abf5b3bed963d7f9705956e`
`font_02_sfnt_off00016a2e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16A2E	11776 bytes
SHA-256: `612cceb987effc528a467f46a7a546220b7d1a508ed4e72a1c36e948805b8055`
`font_03_sfnt_off00019145.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19145	16092 bytes
SHA-256: `9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2`

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