Malicious PDF — malware analysis report

Static analysis result for SHA-256 25c466aff12fa5df…

MALICIOUS

PDF

66.7 KB Created: 2020-11-19 02:57:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8c9781a7f76d1c740025e008ef065fc1 SHA-1: 881ee2d1d3e91ca7bd49ac9acd6fd49f7974e57d SHA-256: 25c466aff12fa5df4ed88000e05db7ca552c7d7a5216340ed4afb0472cd6f5e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a heuristic firing for a 'PDF_SEO_LINK_FARM' which indicates a large number of external links, with one prominent example being a link to a potentially malicious domain. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the nature of the link farm suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/strik?utm_term=kogama+mundo+gigante PDF link annotation
    • https://dujefeva.weebly.com/uploads/1/3/4/5/134589135/jovakiwux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378856/normal_5f8d60a1c0280.pdfIn PDF document text
    • https://kavimexidulivi.weebly.com/uploads/1/3/4/0/134040988/fibuxuvubepof-sigipumovupe-fuvogogibodixu-popuxilejavelog.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/wisuw/nord_summer_camps_new_orleans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/932e600f-08eb-4f91-af14-9b3db63dd757/25500567578.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/negative_effects_of_unemployment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b0da476-ebe5-4070-a37c-3eee95d28707/dodiwoderululige.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/52052533043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eae35ea0-d965-4613-a05d-c2a407a12d43/medodirugaputubemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/786ba59f-37a9-4e47-9c6f-1184443f5f33/rocket_propulsion_elements_9th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff8c4e4-10ed-4d34-b15f-009a3a2372b8/guitar_pro_5_crack_full.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/saddest_love_letter_ever_written.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB417 4808 bytes
SHA-256: 219afd3abcd10a785e50a9b7ab81ddc40377024468c6f9503c3b456276580aa5
font_01_sfnt_off0000c45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC45F 7920 bytes
SHA-256: 53d53c11d5ea4451ee5924a44019cc2ee70042a9ed5f6e41a79399fed043a42b
font_02_sfnt_off0000da7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7F 10576 bytes
SHA-256: a24c2d91f274566cde7478e8b36758b65f8bb24957ab8da991be3f125f26d8e5

Open this report in the interactive analyzer, or submit your own file for analysis.