Malicious PDF — malware analysis report

Static analysis result for SHA-256 8036fed1b54ae186…

MALICIOUS

PDF

66.6 KB Created: 2020-11-19 20:46:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e90cfc15c1011f461078fffb6f26f0a5 SHA-1: 7303211b6b5ab024bdeab5a436f3bc7a6643cc0a SHA-256: 8036fed1b54ae1866d85650c6f1425a3757ffb7e055cddc9233cba20a72a71b4
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, identified by the heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK'. The document body, though heavily obfuscated, suggests a lure related to a 'creature catalogue'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=creature+catalogue+d In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rebomedug/50537165775.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/tovamunuruxap.pdfIn PDF document text
    • https://s3.amazonaws.com/kizuporowefib/xegulujofodek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92d180ad-6237-4d18-8408-3a0ab41b64df/68908247025.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/92826494708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a76cc66-5ab2-4d31-a9a0-1646b075bab6/pokemon_omega_ruby_cia_usa.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/zakuxe.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/elect_the_aspect_of_accounting_associated_with_this_activity.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/packet_tracer_2.2.4.4_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/72901694732.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/74875463049.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/bafeg.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 5

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_off0000c69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC69C 4832 bytes
SHA-256: 7e7aafa22b536a0900c90a9ae6e6f56db47d8714b669e9b926daf4ceb52ce327
font_01_sfnt_off0000d710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD710 11328 bytes
SHA-256: 58d911d736bf45897711f0ea71bbd9d49706aaf0e4dc51e0ddac9fa200e43944

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