Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f45232f17310af3…

MALICIOUS

PDF

69.7 KB Created: 2021-01-19 15:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 066f093c5cad95fdd6849536a561687a SHA-1: 95229b428dcfb11383d4ec48e5d383f4be834c3c SHA-256: 5f45232f17310af3e86fc2e5032f3bb9f3c1da7ce989c0fc246d3513d8dd9ccc
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL designed to exploit search terms related to diet plans. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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.
  • 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://traffking.ru/123?utm_term=dieta+del+metabolismo+acelerado+pdf+online+gratis In PDF document text
    • http://pigovaze.iblogger.org/rujizevuderu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373517/normal_60029f8d065df.pdfIn PDF document text
    • http://pejofewetoz.22web.org/bcom_degree_form_ku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wipidomi.rf.gd/hotmail_email_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/evangelion_op_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/xotexujogame.pdfIn PDF document text
    • http://puzujudu.rf.gd/30320705710.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/wow_70-80_leveling_guide.pdfIn PDF document text
    • http://fojinejadasetax.epizy.com/minecraft_xbox_360_modern_city_map.pdfIn PDF document text
    • http://kirogebi.epizy.com/rifekidagixegav.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_off0000d2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C8 5612 bytes
SHA-256: 75a8285879621e9ca690c7265393ea43cb5940fc8f55a1c50757e49ee8a7a230
font_01_sfnt_off0000e5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C9 11056 bytes
SHA-256: 4a52368bff1e7590f4111810fa7fef6c27b10e332a977e720054531deab6a853

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