Malicious PDF — malware analysis report

Static analysis result for SHA-256 47dc89ac6a26558a…

MALICIOUS

PDF

68.3 KB Created: 2020-12-23 12:53:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 17a98dd03fec0a463ee98f019c429102 SHA-1: 9467ecf757b88ba3525325c45ffe80e3b8b9cdcd SHA-256: 47dc89ac6a26558a2dc59bcd1c9ff82e7bbc04fdc20b504e6f75fe56f7dcc4b7
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan distribution attempt. The embedded URLs and the heuristic detecting a link farm suggest the document is designed to redirect users to malicious sites, likely for downloading further payloads. The presence of a 'download' button heuristic reinforces the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/strik?utm_term=bumble+bee+craft+printable PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370299/normal_5f9bf2e5e46c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401697/normal_5f9ccb955a176.pdfIn PDF document text
    • https://bufetijakuvarit.weebly.com/uploads/1/3/4/8/134878832/jakubafarax_lurisigad.pdfIn PDF document text
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/tebupozef.pdfIn PDF document text
    • https://gojapafusozida.weebly.com/uploads/1/3/4/8/134888769/somusuxaj_medupabawelo_meriwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465274/normal_5fa63def4ef44.pdfIn PDF document text
    • https://fipokotosa.weebly.com/uploads/1/3/4/5/134506619/2232725.pdfIn PDF document text
    • https://jurefuzosapob.weebly.com/uploads/1/3/4/9/134901670/pazadaluwasimo.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/tikaguxozo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408172/normal_5f99cbf5e82b5.pdfIn PDF document text
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/5688011.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5767a5e1-90bb-4724-8cb4-ba7a2fd66f5c/journal_of_american_indian_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc384a3b-7780-44ae-b88c-8a6734dd0543/46599527797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d416a07-2fde-4ab2-8fbd-0b3823dcc0f4/laxedotosilaxujumabuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88ebf73d-98f7-43d9-96e1-f6f0ed74454c/bozimege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3125dec4-ab05-4598-a7ff-0a7757fa60ae/amazing_grace_alto_sax_solo_sheet_music_free.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_off0000cef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF6 5172 bytes
SHA-256: 81f76395448b1adc9998e87cac66fd6f1fc107c0181e438581efcc1eaec0ae50
font_01_sfnt_off0000e077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE077 10396 bytes
SHA-256: 7ad20bd2d0c544f2924d24a4936ba36a098e9e404f95aa6674dd1e347f852375

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