Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d36f315be39a92d…

MALICIOUS

PDF

74.0 KB Created: 2021-03-20 10:23:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d643befbc45ecc2deb32ef25029ca3ca SHA-1: 1bb475f958f0742f626932c356dd1559986c76c0 SHA-256: 7d36f315be39a92d8e898996e09588b1f393c779295c90c7af8d861af144f28b
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=richard+iii+movie+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471992/normal_60322000be3d6.pdfIn PDF document text
    • https://vifiboreb.weebly.com/uploads/1/3/5/3/135349596/dajakefeb-mubomivogesiduv.pdfIn PDF document text
    • https://nametipij.weebly.com/uploads/1/3/1/1/131164318/zefokas.pdfIn PDF document text
    • https://susudomi.weebly.com/uploads/1/3/5/3/135319884/biziwigin.pdfIn PDF document text
    • https://vulewerogoxo.weebly.com/uploads/1/3/4/5/134507491/3667203.pdfIn PDF document text
    • https://juzudibat.weebly.com/uploads/1/3/4/3/134328144/4967363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427526/normal_603a264c282e9.pdfIn PDF document text
    • https://zipiluzus.weebly.com/uploads/1/3/4/2/134234939/newuz_vemejowixavu_moxilowawadetoj_jagida.pdfIn PDF document text
    • http://karivometiw.iblogger.org/aggarwal_college_ballabgarh_online_admission_form.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/jolituzoji/62153703357.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/34471714218.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/41850813894.pdfIn PDF document text
    • http://kizazaf.rf.gd/sekusetugimo.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/raxidapivugosix.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/omron_healthcare_7-series_wrist_monitor_bp652.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/sql_server_order_by_desc_performance.pdfIn PDF document text
    • http://zitaporuzi.rf.gd/xufagezo.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/64480492821.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_off0000e559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE559 5068 bytes
SHA-256: 2ac823c08f61aa57a6dbea047888bba67114dce93e1c0601a24349a89681a00e
font_01_sfnt_off0000f676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF676 10652 bytes
SHA-256: 82336c3c9289b2af4c9c386c5f4d50498780538b1d3a5255f1f5b9d98e0bdcaa

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