Malicious PDF — malware analysis report

Static analysis result for SHA-256 473ab61f3619fd17…

MALICIOUS

PDF

69.6 KB Created: 2020-11-13 22:40:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1e3d7669d3b13b107a3ac2758b756d99 SHA-1: d9df6ad6ee137e566949f66c20da83df3cc510bc SHA-256: 473ab61f3619fd173800fe4891cc8b4f0427f4b3c3231c32fbb91b8c21d02562
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://traffine.ru/strik?utm_term=fifa+19+pc+mods PDF link annotation
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/vukuruwekubu.pdfIn PDF document text
    • https://bixanizutojez.weebly.com/uploads/1/3/4/4/134490846/8237930.pdfIn PDF document text
    • https://wizawexixif.weebly.com/uploads/1/3/4/4/134472694/81fb124f.pdfIn PDF document text
    • https://taxebalipawixu.weebly.com/uploads/1/3/4/5/134598188/e1e6d60de8b38c.pdfIn PDF document text
    • https://vukijimox.weebly.com/uploads/1/3/4/3/134358494/6932595.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/2865631.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/b4470599-cb28-405c-a5f8-701ba15ef9e2/4172550342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/675e8565-5329-4bcc-9615-7525fdfaf47c/the_secret_life_of_bees_chapter_2_st.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee5f705f-9bbe-40ac-bac6-774a135efd00/66994831440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38ee9d9b-4d21-4c6d-b8ca-f9ad0db40719/9802303551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/490fcc76-86db-4ab2-8337-c03c2dc19e5c/level_7_zelda_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ae71ad-1e83-476f-89fe-29bbfd20fa29/13000654819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8fa5a3e-fdd8-4faa-bda6-c690491a179d/essential_idioms_in_english_book.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/31327338034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c76bbbd3-88e5-4317-91fd-dfc6229aedca/resume_format_for_freshers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9df76bf-6f4a-452c-a50e-b8489a88aa53/11936124217.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3ED 5336 bytes
SHA-256: 4269e67d3dc5dcde520265d6beb4c6a69fc723d183c82ee73afd5ece3774c96e
font_01_sfnt_off0000e614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE614 10528 bytes
SHA-256: 173ff424a871ca99a417aadf08004871724c8ef9c00b4f97bae9d0a1da033e43

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