Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3530515d8ec489…

MALICIOUS

PDF

74.8 KB Created: 2020-12-17 21:13:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4e697275af7bb9530b5af11410987a6f SHA-1: eb0996cc6b37ca5cef0913e6a0677618a979e320 SHA-256: 0e3530515d8ec4895a0b09d06460b466042eb235abff71b9eb7352ab67ca4433
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://traffking.ru/strik?utm_term=ap+biology+semester+1+study+guide', is flagged as suspicious and likely leads to a phishing or malware distribution site. The ClamAV detection and ML classifier further support its malicious nature, indicating it's a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=ap+biology+semester+1+study+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471706/normal_5fada31ace2d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387698/normal_5fd077f3656d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_5f8e987c254ea.pdfIn PDF document text
    • https://nobixerevogug.weebly.com/uploads/1/3/4/4/134481004/a9b567cf5e72.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/pomaxa/71296219757.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/minecraft_wiki_villagers.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/japulodidadosew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5a0655c-7f18-454c-bc2e-2b9f3c2dad31/45_colt_vs_44-40_lever_action.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5d6aec7-8159-49cb-b5a8-df8027e2bec2/gesotakokavewugigololamob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a344028-6fbd-44d0-a0ad-7a5dde62d0fa/pananosodezovuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ddbfaf-b162-4cbd-8947-226c0cd79121/81018639658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5909ec9b-3c8e-4298-86ca-b1db04d90064/fimebojikomenax.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CB 5352 bytes
SHA-256: f66af5f2f9f9a9f7dae1054376b048d22265860e48f07f3f34cae55b36ededf6
font_01_sfnt_off0000faf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF4 10636 bytes
SHA-256: fd0c36061fa2bfe27fdad874bd8943ee5c623b394d23de685a961abfdaf4228b

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