Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9214f17831bf2c…

MALICIOUS

PDF

73.2 KB Created: 2021-01-24 21:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 808fec59057c52914dc0bd9b1bc0cb5e SHA-1: 03a9d9e4c8c172be4734c031c82073c26b3e2d99 SHA-256: 8e9214f17831bf2c0a82676cf872594962c1f88b44a5c119293c3d3aa8544d47
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, yafferge.ru, which is disguised as a service manual. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to trick users into visiting malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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/123?utm_term=2004+nissan+sentra+service+manual+pdf In PDF document text
    • http://idealslim-italiaoficial.site/najususoremudodosixigawavuqkec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379385/normal_5ff5752af2778.pdfIn PDF document text
    • http://copyrights-notices-helps.com/sotagaede2v.pdfIn PDF document text
    • http://justiciaforjustice.com/pijegaksycb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454303/normal_5fca3e7844050.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394061/normal_5fec7cf6b1688.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427300/normal_5fcfa4fcef999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448539/normal_5fd6fea9bcd75.pdfIn PDF document text
    • http://feziweninepiv.iblogger.org/tudimamuku.pdfIn PDF document text
    • http://znalomstvavip.site/41783736825z1gfq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382190/normal_5ff69b2e45525.pdfIn PDF document text
    • http://vuvuga.xyz/84384243372hy5fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nisogifamesada.epizy.com/femosaxuril.pdfIn PDF document text
    • http://povuputuk.epizy.com/baofeng_uv_82hp_manual.pdfIn PDF document text
    • http://mowelafawugek.epizy.com/sample_capital_expenditure_budget_template.pdfIn PDF document text
    • http://pimovutune.rf.gd/android_app_icon_generator_online_free.pdfIn PDF document text
    • http://gowegonuma.epizy.com/ragnarok_me_priest_leveling_guide.pdfIn PDF document text
    • http://zinezalidoratov.rf.gd/92353819880.pdfIn PDF document text
    • http://wisunomimat.epizy.com/concerning_hobbits_violin_sheet.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_off0000dfc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC7 5628 bytes
SHA-256: 7cd97417e666b2250f6e2d882d7f7275f17689b90d285d907c54b154f8a71cf2
font_01_sfnt_off0000f2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DF 10616 bytes
SHA-256: 1e246ea46ab653f44ae4b9a7190eb28ef4b8d6404cafc2c10c16e2d14fcf8770

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