Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4459e6603d7739c…

MALICIOUS

PDF

92.4 KB Created: 2021-01-13 14:47:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 69e8f5e6bc20dd3d544d1960f151f4b9 SHA-1: 0140bb35c93096d0ea0247a301906c173513341f SHA-256: b4459e6603d7739c5af9cf4a8d0f6b761d98c203fb1ccf88d4c3c6b08e866274
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://traffset.ru/aws?utm_term=sacramento+news+10+reporters PDF link annotation
    • https://site-1176453.mozfiles.com/files/1176453/4045989507.pdfIn PDF document text
    • https://vebajixumese.weebly.com/uploads/1/3/4/4/134483039/28475.pdfIn PDF document text
    • https://site-1175032.mozfiles.com/files/1175032/inside_out_movie_hidden_meaning.pdfIn PDF document text
    • https://site-1200133.mozfiles.com/files/1200133/48330540122.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368479/normal_5ffeba4fc0e12.pdfIn PDF document text
    • https://site-1174236.mozfiles.com/files/1174236/6189855104.pdfIn PDF document text
    • https://site-1168144.mozfiles.com/files/1168144/download_aplikasi_magic_fluids_full_version_apk.pdfIn PDF document text
    • https://wivujawa.weebly.com/uploads/1/3/4/5/134582083/romawaziged.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478968/normal_5ff813c657fc6.pdfIn PDF document text
    • https://site-1179234.mozfiles.com/files/1179234/world_music_access.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421330/normal_5fad447d39812.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00012b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B69 5436 bytes
SHA-256: 3a91ccf9abd8b98ef34a6483a41654eab91fa31881d108aa48994b38211de4cb
font_01_sfnt_off00013de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE2 11436 bytes
SHA-256: ea88eeaac5308ac43486a60427160f7dac1a5d6f41f0be16dcbad694ad1224bf

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