Malicious PDF — malware analysis report

Static analysis result for SHA-256 c412ef00f9008e75…

MALICIOUS

PDF

66.2 KB Created: 2021-03-28 17:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: de556111fb15dd46b8ac9723b4204142 SHA-1: 1c13ce7a1a94292a947a1f6df361c6d05fc24797 SHA-256: c412ef00f9008e759535189c4653c45cc0d206a5818169b9af8251f841a442fb
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('soxebez.ru') that is likely used for distributing malware or conducting phishing attacks. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document's structure is designed to host many links, further supporting the malicious intent.

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://soxebez.ru/strik?utm_term=sig+p226+22lr PDF link annotation
    • http://vivubowi.getenjoyment.net/gst_rate_schedule_for_goods_and_services.pdfIn PDF document text
    • https://cdn.sqhk.co/puwidebudojo/DWWjbyv/23998707909.pdfIn PDF document text
    • http://dawavuwera.22web.org/bogebuwebuvon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527164/normal_602b922bdc597.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477156/normal_5fd8304bb50e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408584/normal_5ff9174ad0118.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/iduggid/audrie_and_daisy_imdb_parents_guide.pdfIn PDF document text
    • http://metagopu.22web.org/79455935574.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/jjgigdh/fobapavavawudenegizaje.pdfIn PDF document text
    • https://cdn.sqhk.co/powurejur/gdjesgh/jaxima.pdfIn PDF document text
    • http://lokubakodo.getenjoyment.net/jesobipiwedevugojiku.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/CgIhchh/titikuvala.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/zufaxepixiguxax/anna_bond_kannada_movie_songs_free.pdfIn PDF document text
    • http://koduwutuvage.onlinewebshop.net/reading_ielts_practice_test.pdfIn PDF document text
    • https://a765b249-d442-4b07-8ea9-8318d996b894.filesusr.com/ugd/902d29_93468073bb434e298f7e79034e444f81.pdf?index=trueIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_5ee8b27bed954d05a4c940134663811d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/xosedeniduxavodabotamojux.pdfIn PDF document text
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_6fa4513e7121437ca71e8d684ff83882.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/97696713687.pdfIn PDF document text
    • http://katetagozu.epizy.com/fowulufufiluzibetukeju.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_off0000c629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC629 4988 bytes
SHA-256: f486666474d6a9c2e483160e422dd3caf7b95d80f74417a2d4a6da471d5f8cb3
font_01_sfnt_off0000d739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD739 10380 bytes
SHA-256: cad97dee8e5b3fe944527d784a7a8a415b7c6aa093f4ebce0048415f2311d797

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