Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc229e720b94dfb…

MALICIOUS

PDF

65.0 KB Created: 2021-01-23 04:47:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: edda873158fe2394da3d9425c1ca0cdd SHA-1: 2fa3ba4de5ac7970a333a64e04ed5dd3016bc3b6 SHA-256: ebc229e720b94dfbfefdebe2790813c63a2b3a8b6599843de9647315e256008c
126 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 multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous external URIs, with one specifically identified as a redirector on disposable hosting, indicating a link farm designed to lead users to malicious sites. The presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafffi.ru/123?utm_term=cvs+ice+pack+for+back PDF link annotation
    • https://site-1166670.mozfiles.com/files/1166670/mummy_returns_movie.pdfIn PDF document text
    • https://tumuzisokume.weebly.com/uploads/1/3/5/3/135351536/zasagekinogojidu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419828/normal_5fde53649fb73.pdfIn PDF document text
    • https://muwemobivom.weebly.com/uploads/1/3/0/7/130776082/5781259.pdfIn PDF document text
    • https://cdn.sqhk.co/kenujowemi/jijehiG/corona_briefing_today_uk.pdfIn PDF document text
    • https://baboxubawuxi.weebly.com/uploads/1/3/4/6/134666135/likidenodiripur.pdfIn PDF document text
    • https://site-1174269.mozfiles.com/files/1174269/wuvusukawexemejopobe.pdfIn PDF document text
    • https://site-1175916.mozfiles.com/files/1175916/boku_no_pico_de_gallo_meaning.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461207/normal_5fc8c0a15662e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446270/normal_6000c21fbc929.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/2599510.pdfIn PDF document text
    • https://site-1178096.mozfiles.com/files/1178096/raid_ant_traps_reviews.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/tarizirefevifab/personal_assets_and_liabilities_statement_sbi_format.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/ark_survival_evolved_dinosaur_taming_guide.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_off0000c0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D2 5148 bytes
SHA-256: 2a4187a021f7cb4a95cec08ddf302b3a58b2800a9781229d0f88470cd0026919
font_01_sfnt_off0000d26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26E 11336 bytes
SHA-256: d136e3f03181806857e6b017935e88239a86c9087808788d728dd2b2108949fa

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