Malicious PDF — malware analysis report

Static analysis result for SHA-256 13facf886dadadfa…

MALICIOUS

PDF

73.2 KB Created: 2021-01-21 15:45:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 414c954aaeec81cf61eab2a21da6a639 SHA-1: 6c0dae61d31f04d3c639b9c5722129d55cf701f3 SHA-256: 13facf886dadadfab961be0f637eea3298db914827346e64069977d530e451ee
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is structured as a link farm on disposable hosting, suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a misleading title, further supporting a lure-based attack pattern.

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://traffnew.ru/123?utm_term=nuevo+testamento+trilingue+pdf PDF link annotation
    • https://cdn.sqhk.co/xelalizogim/Vegi2D3/time_do_dodgers_play_today.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464529/normal_5fda920dc7ed9.pdfIn PDF document text
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/pudaxazude-liredaga-dupuzi.pdfIn PDF document text
    • https://fekugutupufug.weebly.com/uploads/1/3/4/8/134876907/relarazok_nigope_salofanul_kimupobekobur.pdfIn PDF document text
    • https://cdn.sqhk.co/pomorezolo/djiPxjj/snowflake_drawing_easy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_5f8f0873266ff.pdfIn PDF document text
    • https://wogilaxafa.weebly.com/uploads/1/3/4/4/134479860/1732480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444351/normal_5fbbdab019c04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420438/normal_5ff801389fae1.pdfIn PDF document text
    • https://sowujapureku.weebly.com/uploads/1/3/0/9/130969862/wetoz.pdfIn PDF document text
    • https://zokelafeg.weebly.com/uploads/1/3/4/8/134889419/664327.pdfIn PDF document text
    • https://kenufipafalenar.weebly.com/uploads/1/3/4/6/134616414/2987234.pdfIn PDF document text
    • https://cdn.sqhk.co/zigimovovu/jERghjc/26150780029.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pujirageg/android_9_pie_theme_apk.pdfIn PDF document text
    • http://dajejat.rf.gd/australian_visa_1419_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/mpi_sea_container_log_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/blank_digital_clock_face_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A1 5272 bytes
SHA-256: 352ce4cc2deb9f80c3f79bbec0317331c6ccd678bae18116e86fdcd62e9adb5c
font_01_sfnt_off0000e281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE281 11360 bytes
SHA-256: 0c7419f53e035a8217117f084866657bef35f814db290b070b8f740c9c3d3a05
font_02_sfnt_off00010826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10826 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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