Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35b0e72c06f7811…

MALICIOUS

PDF

73.0 KB Created: 2020-12-01 20:41:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9fe5031b0fec95ec3fb692de63588a2c SHA-1: d501b064b72a0f897429ff4939885beff82e3688 SHA-256: c35b0e72c06f7811e36fc7ae85c321fef20924ae57ae29b69ba5057ff557cf10
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO spam or phishing campaigns. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious websites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafficel.ru/strik?utm_term=chasing+ice+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415767/normal_5fa93149166df.pdfIn PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/3222330.pdfIn PDF document text
    • https://xiwofisenitew.weebly.com/uploads/1/3/4/8/134879753/37c47d7c9c62a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f911bfc72a82.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/warepanadibi-mutowovos-bakorexejav-mirazumepeju.pdfIn PDF document text
    • https://zidabowejixu.weebly.com/uploads/1/3/1/1/131163559/6932602.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://static1.squarespace.com/static/5fbfdd38a3bf4b14aba341ea/t/5fc0db9008845d0924aa372e/1606474642047/conan_exiles_black_keep_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15df1e9fc3622d5255c20/t/5fc3d65161e25426e1ad669f/1606669913880/2.6_converting_rates_worksheet_answer_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1c049c6d9645836281f45/t/5fc4bc4ff8cdb769c678a65b/1606728783599/toshiba_regza_32_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/kejoviribi.pdfIn PDF document text
    • https://s3.amazonaws.com/kozikixoju/smd_audio_multimeter.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/beckman_coulter_au680_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/chapter_12_to_kill_a_mockingbird.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3375b12facd59cebbf51f/t/5fc59284eaf37e3b645bdccb/1606783622216/automated_5103_notice_response.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf214edabee7b440664ba/1606218261172/belleza_y_estetica_en_espana.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD460 4996 bytes
SHA-256: 7e3fa19a464cc02c0759a46e23a24a154a29f374125d69a72fb4b0123f8338bf
font_01_sfnt_off0000e565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE565 10544 bytes
SHA-256: d83a30914be1c7ba699b7ee7941c4ee4ce2189937252aef291eebdf598984f5a
font_02_sfnt_off00010954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10954 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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