Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca4f6053a7dce2d…

MALICIOUS

PDF

66.3 KB Created: 2020-12-07 14:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e1ebb29806aee58a860c09aa946940fa SHA-1: d25f7e9e4d2760088d22f7ed81b37154d4e80900 SHA-256: eca4f6053a7dce2d914fc9b0770a9027aadec02c41ef19b4a3f55d308283f0f9
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://trafficel.ru/aws?utm_term=answer+lyrics+sarah+mclachlan+meaning PDF link annotation
    • https://kugugurufive.weebly.com/uploads/1/3/4/1/134108893/didosag.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/tobusal.pdfIn PDF document text
    • https://mekuluvuxagol.weebly.com/uploads/1/3/4/5/134589608/826178358.pdfIn PDF document text
    • https://wimugedi.weebly.com/uploads/1/3/4/7/134725841/migafo-wumudugapeli-wepalojifolelak.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/pomaruxeninedan.pdfIn PDF document text
    • https://mofalapew.weebly.com/uploads/1/3/4/3/134307760/vowux.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://uploads.strikinglycdn.com/files/e50eadee-6533-4ec4-8dff-a7c85c714a16/mupesavevob.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/dodegevedus.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/tumor_cabeza_de_pancreas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c2cc45e-ae9f-4aec-b518-81a56f267fcf/94408718731.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/zalunejuzagawimurut.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/gimux.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2aae6f7cf8c7540363e08/t/5fcace5d1880ce05e83d1733/1607126623379/54943343120.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd177a31dcc34bf48defcd/1606227835214/a_word_that_starts_with_re.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_off0000b9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B5 4996 bytes
SHA-256: c5116892b28261f045a827c8a8581a7463eef82428cca7efbc7d9c018d5ff563
font_01_sfnt_off0000ca7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7E 10560 bytes
SHA-256: 436908002d94afce71b3f7908436681f5b578593121773c9fadcc168b00681a8
font_02_sfnt_off0000ee67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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