Malicious PDF — malware analysis report

Static analysis result for SHA-256 25dfc0a46058537f…

MALICIOUS

PDF

78.0 KB Created: 2021-05-29 11:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a651b25635ee34281c9bd97c8716cc2c SHA-1: 9bd4ae8bc8f55b9cff21dfe3b1bcee157fa7534f SHA-256: 25dfc0a46058537f7a5bd262b1c7e67291c6460776d59424138c4f912e3f0cff
254 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. The primary redirector URL is 'https://crophysi.ru/wb?keyword=the%20last%20song%20cast%20miley%20cyrus%20full%20movie', which is designed to lead users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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.
  • 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://crophysi.ru/wb?keyword=the%20last%20song%20cast%20miley%20cyrus%20full%20movie In PDF document text
    • https://welavofewefose.weebly.com/uploads/1/3/0/8/130813025/7347541.pdfIn PDF document text
    • https://bopatixenokukab.weebly.com/uploads/1/3/4/8/134873261/c0b53607a.pdfIn PDF document text
    • https://moninedowilex.weebly.com/uploads/1/3/1/4/131436981/leroriko_wofesominumupo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378608/normal_6002ee2115a73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475572/normal_5ff1b3ffd5e11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447497/normal_601aefca309b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466151/normal_5ff32f5f88063.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444630/normal_6005d4e7da232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423133/normal_5fdb119a7c0a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419412/normal_5fce2973388c3.pdfIn PDF document text
    • https://leludexubivavij.weebly.com/uploads/1/3/1/8/131860378/a71b7d3a3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_6024fc082a6c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443357/normal_6032cf0de7601.pdfIn PDF document text
    • https://nowitijot.weebly.com/uploads/1/3/4/7/134716658/4554531.pdfIn PDF document text
    • https://bunemevomuw.weebly.com/uploads/1/3/4/7/134733911/xugijeg_zawadepelujege_fegasu_fulekezereba.pdfIn PDF document text
    • https://bagetakibejo.weebly.com/uploads/1/3/1/8/131871627/kebajirefo-bozigopikogokud-padanojugalit-girosozaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446394/normal_604472e7d793f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482848/normal_605b3d29c7ed0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/004d1dff-3e30-4adc-8387-d6292255f642/sql_query_tutorial_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b76d7674-e053-48da-adff-25282c992301/what_constitutes_abuse_of_power.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f018464d-bb9e-4965-b211-d3533b111759/tifuvorimalexiseku.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_off0000ef76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF76 5404 bytes
SHA-256: 9333fe3a19a85a573a5bb4f36bec4661ed1da003c341b3310383ae3a4f902cf9
font_01_sfnt_off000101c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 11368 bytes
SHA-256: 08aeaa1530e454b94481e38c4b5dd414173e23a61fafd75a1e8f5f7a8e7d02cb