Malicious PDF — malware analysis report

Static analysis result for SHA-256 f26ca2c2fcb525fd…

MALICIOUS

PDF

60.4 KB Created: 2020-11-16 21:46:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 101a9e198a20ee6fddae2789350a5c93 SHA-1: dea9cbcf3697c14d7a1a3b1433b31668900d1d2c SHA-256: f26ca2c2fcb525fd0dc48d52c9805d456ef71a69ed26408e78a166118ef473b7
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/123?utm_term=redken+extreme+anti+snap+shampoo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371791/normal_5f8f723419db7.pdfIn PDF document text
    • https://lajutiruwogow.weebly.com/uploads/1/3/4/5/134585316/468961e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_5fa7b03670265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388038/normal_5f98df638b974.pdfIn PDF document text
    • https://wunogalabapa.weebly.com/uploads/1/3/4/6/134603674/77cda55b22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383805/normal_5f8ce92bae001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373240/normal_5fae3dd760c9a.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/7ee04bad317b2.pdfIn PDF document text
    • https://fimetopim.weebly.com/uploads/1/3/4/3/134399480/jakog.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/vonusirukete/1580102104.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/wave_interference_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/core_questions_in_philosophy.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/pavufuzufolawudebujulap.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/todo_app_for_couples.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/xenalinanuritizaga.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_off0000aee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE3 5304 bytes
SHA-256: df387f441af4fe42b951f0fee86d16a4876b6a81285ff5b2a4da206d170e90f5
font_01_sfnt_off0000c0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C4 10128 bytes
SHA-256: 7638e1c12fe69e505ec1d54609ce57a48073e27bc48c4af7d8805d61b2bef72a

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