Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6b41e8048d33d7…

MALICIOUS

PDF

66.8 KB Created: 2021-03-06 13:51:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 969c10a32d539e4f8fdf53a5e71c8865 SHA-1: 2359e25244f3824d89d5a430e82aac61f30dc9a5 SHA-256: cf6b41e8048d33d74dfb1f05d65354e01b4fe9ddbeb4d9487648bea92d9c64fb
156 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 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 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://mezovuduw.ru/wix?keyword=el+cuarto+misterioso+episodio+4+worksheet+answers PDF link annotation
    • https://xotonibesil.weebly.com/uploads/1/3/1/4/131407892/vananatolumebelepa.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/short_fable_stories_with_moral_lesson.pdfIn PDF document text
    • http://desokore.medianewsonline.com/who_needs_to_be_iso_27001_certified.pdfIn PDF document text
    • https://vufepuxo.weebly.com/uploads/1/3/4/5/134522835/zikef_lawoxa_fevadufiwinu.pdfIn PDF document text
    • http://finoginujowiwi.mypressonline.com/how_to_read_your_birth_chart_wheel.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/timeziso/96098645605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5903daef-8f2b-4895-a0ec-17b3a8a5bd81/3687942226.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/axon_x2_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/71017817963.pdfIn PDF document text
    • http://fuzaxovojige.epizy.com/pamojexerokukasewakoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10ac04ca-d314-47d3-b8c5-5c520e38c789/linear_integrated_circuits_books_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/sojukukemud.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/suzifugemoborufoman.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/hotpoint_aqualtis_aq113f497e_washing_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/96324183523.pdfIn PDF document text
    • http://vilewol.epizy.com/we_should_all_be_feminists_book.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/sample_resume_format_for_biotechnology_freshers.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/partnership_appropriation_account.pdfIn PDF document text
    • http://busilumun.rf.gd/30264096860.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_off0000c5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D4 5516 bytes
SHA-256: e5462d1fa72a8ea84450c115cd926ae59faa269d764e9e885b29d5ab4c457233
font_01_sfnt_off0000d888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD888 10748 bytes
SHA-256: ebcb4332524e9311c305d60845afc9e73df818e2892348adb4d90319ddfe59ee

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