Malicious PDF — malware analysis report

Static analysis result for SHA-256 617555cbfc6ae746…

MALICIOUS

PDF

67.3 KB Created: 2021-02-15 13:27:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 26c72e41f2f860bfb5ff96b1d0b269b5 SHA-1: 0583f176f02f9401c67c9970cbf067ce3bdad477 SHA-256: 617555cbfc6ae746c5e3272cff8c572d5622ccbd98e0015c2186937bc80c8b9d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a lure for 'Las edades de lulu pdf'. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, suggesting a phishing or malicious redirection scheme. ClamAV detection and ML classification strongly indicate malicious intent, likely to redirect users to a phishing site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/strik?utm_term=las+edades+de+lulu+pdf PDF link annotation
    • http://spindlndou.space/coenzyme_q10_liquid_form_costcotgtgs.pdfIn PDF document text
    • https://cdn.sqhk.co/zegetaru/2hPd9ii/24975290892.pdfIn PDF document text
    • http://chisto-chisto52.ru/matemticas_financieras_aplicadas_127_problemas_resueltosxil9m.pdfIn PDF document text
    • http://ipatovaalena.ru/babilomudedu7oc0l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374376/normal_6027931c53ad6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491669/normal_601327448dcdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379053/normal_6019a5dc8fa16.pdfIn PDF document text
    • http://vibigobefe.22web.org/joyful_joyful_tommy_walker_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/nipigagavadu/jg3geoU/79442381509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420031/normal_6025f72ae36ca.pdfIn PDF document text
    • http://cryogen.me/58133319847llgb8.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/vitelitubovuluj/internal_meeting_request_email_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/jadudisunovoxurojatak.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/danganronpa_1_trophy_guide.pdfIn PDF document text
    • http://lenadupubop.rf.gd/madama.pdfIn PDF document text
    • http://zexizel.epizy.com/8953567019.pdfIn PDF document text
    • http://xaloluzagaga.rf.gd/conjunction_worksheets_grade_5.pdfIn PDF document text
    • http://luvomovasofigu.rf.gd/clinical_guidelines_for_chronic_heart_failure.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 8

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_off0000c94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC94B 4880 bytes
SHA-256: 979b581cd53d5db8b5d5609376f20c77fd219598c927863fbbc175d2b29336b6
font_01_sfnt_off0000d9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FF 11240 bytes
SHA-256: 9ec2c554e0d230b522eb330c3d2236261db2d312945c4618a850fe81b2f422a2

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