Malicious PDF — malware analysis report

Static analysis result for SHA-256 305beac6eae1ada0…

MALICIOUS

PDF

91.0 KB Created: 2021-02-25 21:01:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bbf36d69fc0cbec8c5936308ce60057f SHA-1: d3b9c13583623e58678c1ac39791ae297831fd96 SHA-256: 305beac6eae1ada0ea319202f020c9b73875c0a894b082d7a2d35b33f910b511
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik?utm_term=english+lesson+speaking+activities'. This indicates the document is designed to lure users to a potentially malicious website. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests it could be used to deliver a second-stage payload or phish for credentials.

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/strik?utm_term=english+lesson+speaking+activities In PDF document text
    • https://cdn-cms.f-static.net/uploads/4447271/normal_602550614e403.pdfIn PDF document text
    • https://punujagenak.weebly.com/uploads/1/3/0/7/130775029/voxixetasosoxok.pdfIn PDF document text
    • https://nivebisela.weebly.com/uploads/1/3/3/9/133997547/a95dd936e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369185/normal_5fd032239af91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417805/normal_5fc9cc2e50385.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/dujejo-geximasexax-metomupukiwet.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/runuzitexokol/adobe_illustrator_cs6_apk.pdfIn PDF document text
    • http://bibibojusajol.rf.gd/torikoxezamagewafutu.pdfIn PDF document text
    • http://lolurisufetofel.epizy.com/btc_full_form_in_medical.pdfIn PDF document text
    • http://waxaravibew.epizy.com/paper_flower_template_cutter.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/albania_country_risk_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/ejemplo_de_reporte_de_investigacion_documental.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/blended_full_movie_sub_indo.pdfIn PDF document text
    • http://getetir.epizy.com/alphabet_writing_practice_sheets_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/optiplex_7010_sff_max_ram.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/african_hit_songs_2019.pdfIn PDF document text
    • http://wafibajew.epizy.com/95998872182.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/gokokubopije.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_off00012688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12688 5180 bytes
SHA-256: 8fecfe4c0b9fd9b489f6e5ad71d92c9370ab1d3164ed8c741c6ff331f4a27fe5
font_01_sfnt_off0001383b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383B 10840 bytes
SHA-256: 0e0ddce8e072e981c4df2db47df5fcdee609ff5560fa2efa10fd5937b90e4d3a

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