Malicious PDF — malware analysis report

Static analysis result for SHA-256 5402d621519c13ef…

MALICIOUS

PDF

72.5 KB Created: 2020-11-13 06:06:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: aef5f0f8a5d14284d1edec15f96a005c SHA-1: 9170f6874338482653e63f528d47ed55ef695733 SHA-256: 5402d621519c13ef25b1e53e7f34d40a83968993830060527bdc8d96d700c8af
156 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 0.9997

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://traffking.ru/strik?utm_term=capacidades+condicionales+fuerza PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373749/normal_5f8f56df7c436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_5fa9d66e10f34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410988/normal_5faab6e3b238b.pdfIn PDF document text
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/dirukun.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/03a52d46-badc-4aa1-b008-780210a63040/pubomimalopuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac3fe416-b386-4179-9b86-9f39166cbbe9/80919132721.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/movie_links_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32522161-47ba-4be5-852f-69dfbadf5a25/causas_provveis_de_vertigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6356257-0d3b-41db-a09c-4d24d16438e6/rasakijos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8793da3-2086-40c1-89d1-9887c35d3800/jagozelobinewagexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b458581a-446d-4e17-9c35-07da7cb89a99/69531833623.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/milufojaxudaliza.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/47052047950.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 3

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_off0000ddc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC8 5104 bytes
SHA-256: 447af059761171563e6405c55ef08659ce46eed6e54f5558da0d051537b17409
font_01_sfnt_off0000ef37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF37 11284 bytes
SHA-256: f6f396aab6a8d77c867a05d35e5adf8391255a9b6e9b81db6682c7be0ba845fc

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