Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c52dcdfa93d1251…

MALICIOUS

PDF

73.6 KB Created: 2021-02-26 04:10:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 395360f519daeee621090583bbcd1a60 SHA-1: cb8484602310083d73efbc55b1684cf0bd6e8b01 SHA-256: 4c52dcdfa93d12517077cd43263eb8e5c4add33ed8242507eef3c9a866d59479
192 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically identified as a phishing lure for free downloads. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9807

Heuristics 4

  • 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.
  • 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/award?keyword=what+does+adaptive+behavior+skills+mean In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_60123a071a817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464702/normal_600d480f8ef92.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/vojunivuxagosojulis.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/how_to_create_a_word_cloud_from_excel_data.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/how_to_scan_double_sided_documents_on_hp_officejet_4630.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379362/normal_5fc7102d9183e.pdfIn PDF document text
    • http://galosidijixiwu.mypressonline.com/who_is_the_poorest_person_in_earth.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/Ojdheii/waves_tuner_full_apk.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/dewalt_dw402_parts_breakdown.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427091/normal_5fd814ea11e34.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/lurofej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402507/normal_6027576b16ffd.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/xosobadomozor.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/erKqjbS/34363622457.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/kujesulad/73826434977.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/7030466647.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/niworejeva.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/28995363268.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/xejobesuxeloralugefukevuf.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10602 5476 bytes
SHA-256: 5d56529782cd3111c17c8bfdf60a0ef2e7d86d9dd1ec33e331fa77a330990a96

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