Malicious PDF — malware analysis report

Static analysis result for SHA-256 471260e454c01a18…

MALICIOUS

PDF

73.5 KB Created: 2021-05-03 09:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 73cc61ee226cf457715c91a27d3b6499 SHA-1: 21f674e843dbd127a75ad1d249786acdb2420de9 SHA-256: 471260e454c01a186435b14396769082a697c9244b59e8689c810c063431910c
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 redirect to a malicious URL, identified as a phishing lure related to 'LG 4G LTE factory reset'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the presence of malicious redirector links is a high-confidence indicator of a phishing attack.

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://yafferge.ru/strik?utm_term=lg+4g+lte+factory+reset In PDF document text
    • http://pitushok.space/36578757731cx5t5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401519/normal_606e3ae2d7d25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375356/normal_5ff48ce92ce86.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/h7q6jjD/24298723174.pdfIn PDF document text
    • http://4338bacchus.com/dom_juan_moliere_synopsisai3rb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374372/normal_5fcf0702ebf9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407087/normal_606054e8a35b0.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/gmXgLPK/gazazowuf.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/hhytdhg/amazon_seller_support_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/dozumapufa/XibjgLo/48049328576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471235/normal_604cd65e08ad6.pdfIn PDF document text
    • https://cdn.sqhk.co/sozodumupof/gicifha/2651460919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495838/normal_601a505d07579.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/bidemewufa/titus_andronicus_arden.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/pagutizew.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/8494167458.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/iso_9001_non_conformance_report_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/naruto_shippuden_volume_113_cz.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 4

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_off0000e356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE356 5180 bytes
SHA-256: 738d5e3cefba25ea51ed9b41a3f93cdf24f0790c8ab420a2e4e5a019c79df349
font_01_sfnt_off0000f521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF521 10616 bytes
SHA-256: fdc8e76c053a5922180c08618dd0524800a5c7d36b7ed1abfe1758029a96db7a

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