Malicious PDF — malware analysis report

Static analysis result for SHA-256 03553ecb90e58aef…

MALICIOUS

PDF

75.2 KB Created: 2020-11-14 13:24:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 470c19dfe37f7820d44b160dcf0bc778 SHA-1: d39df99a7adbde2f5c059ab4764f5f692b798f37 SHA-256: 03553ecb90e58aef8e1fcf66a45e9d429b16c0e698860655eec89cbb31b91a75
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/123?utm_term=roman+chair+exercises+for+lower+back+pain In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378830/normal_5f9fa1cc982c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386591/normal_5fadcd30dbaf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_5f8eabf640019.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/zepifudoxapo/hangsaman_shirley_jackson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc080c8-4548-466d-aeaf-a4d32fb861bb/betofagebuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58675b95-beea-4cca-8bf2-2a69640cec71/pazute.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/modeling_linear_equations_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c70cb3e-a4bf-4434-80b7-d22a28dbfa18/tagavesobugisojisel.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/49871255054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1ee3a8a-848f-4d4f-86af-ed1a9738fbc4/the_clod_and_the_pebble_sparknotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/322c4a5c-8f15-4a62-821d-0b85bd53737b/15928296775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81d42167-4958-41a6-a7ab-567bc7bea4cf/ziradelod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcee3fa9-1af5-4ca2-9d85-0143689e4621/59275283925.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/something_beatles_chords.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_off0000dabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABC 5336 bytes
SHA-256: 40552bee333978219c15f78db1fe816ccecc33e3e73fd7af7d839df31dba1611
font_01_sfnt_off0000ecb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB2 10868 bytes
SHA-256: d55d4819f1251b4ef7153c4ef49dc843c8509d64715017b13d54fc564bf33fa5
font_02_sfnt_off000111aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111AA 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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