Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12cda8a0f550724…

MALICIOUS

PDF

70.7 KB Created: 2020-12-14 00:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0971daeaa446a811b7f9d7c607bf34c7 SHA-1: d0dc402b0736d089906929b8d814253f9018637a SHA-256: b12cda8a0f550724b05a84f5f4eea4609eae9481e12617ab7f46672459762206
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 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=butch+femme+aesthetic In PDF document text
    • https://cdn-cms.f-static.net/uploads/4481163/normal_5faf8760dcf3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390381/normal_5fc8e962d7eb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368489/normal_5fcb486a622eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390324/normal_5f9f61fc039a2.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/5fc68a6da8793968642f1420/t/5fcfe28113cd4c5f74960c6d/1607459458508/nbc_sports_chicago_plus_live_stream.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/29284583466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/104c2e86-9ec5-44d7-adbe-064939b757e1/58491242657.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/free_coloring_sheets_for_fall.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f8256b97992eb5696e44/t/5fcdf6d1d235d37878ea07d7/1607333585847/xizapugokametodex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e095ae67-3787-43e3-84d5-64d3dc16dba3/importancia_de_las_ecuaciones_cuadra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75ca9e38-6b0b-489f-974c-5463b8a9bf29/rugano.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/gufitewenotalalefuxupex.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_off0000cc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC39 4708 bytes
SHA-256: 21bd794d4789dee83b27d505586aec75616c866bbda23147990ffe87534a913e
font_01_sfnt_off0000dc43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC43 10996 bytes
SHA-256: f112de420ecdca8aff4ae8be2be7088226beaaf2db923e8497d58bf5fbf2bb95
font_02_sfnt_off0001008f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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