Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96b6eaabdb2e9bd…

MALICIOUS

PDF

66.6 KB Created: 2021-03-19 19:22:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a047fd9cebfc57b5da82b55512466e49 SHA-1: 80f07efafcc61ccc59df9cf673c2dc34ab0a6b40 SHA-256: e96b6eaabdb2e9bd984aa4b22c1b842178b049952da98e9af5628ea08f66f24b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://fokemale.ru/aws?utm_term=nike+junior+air+force+1+mid+trainer+white PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481062/normal_60465ad0168a7.pdfIn PDF document text
    • http://xotujezal.mypressonline.com/48567805104.pdfIn PDF document text
    • http://pisumuvate.sportsontheweb.net/fahrenheit_451_study_guide_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374851/normal_5fd5f5b4a61cc.pdfIn PDF document text
    • http://kavelokafozi.medianewsonline.com/data_structure_interview_questions_in_java.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380393/normal_600faf9010ce2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443337/normal_6024f727bd3a5.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/27016489172.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_6016c76f4089e.pdfIn PDF document text
    • http://kevebofuru.medianewsonline.com/al_nahar_newspaper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413362/normal_5fd7132aeed17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412607/normal_60304ff282e48.pdfIn PDF document text
    • https://cdn.sqhk.co/wememiguw/0qcijge/cool_phone_ringtone_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500668/normal_5fefebe4eca3d.pdfIn PDF document text
    • https://cdn.sqhk.co/genamudazunu/geHhjhd/football_apparel_near_me.pdfIn PDF document text
    • http://tarezirok.mypressonline.com/81874488435.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b11e4d0e-9927-43f5-ba5d-ff3b79c70c5b/mutabofatopixejo.pdfIn PDF document text
    • http://mijovutotukedes.onlinewebshop.net/58754441947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d9a126-1ef9-4cad-8089-0b845d416cc4/dador_de_recuerdos_libro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b95c53fe-4fa7-41bd-8530-f65126f44878/mandarin_pinyin_chart.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_off0000c792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC792 5304 bytes
SHA-256: 5e19444c4ed2154d141ccd020566f596aaddf9d64b1b738978d0c2c9041a89ee
font_01_sfnt_off0000d997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD997 10300 bytes
SHA-256: 15bbd5676fc680aecfc93d3560f77e11d6f7795e3da8a67c3261013721ea4dec

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