Malicious PDF — malware analysis report

Static analysis result for SHA-256 7237595f0e689f81…

MALICIOUS

PDF

73.1 KB Created: 2020-11-19 05:15:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f55aa6e72e88c1edc8ebda5873603776 SHA-1: d95e7ddc52be78608aafbc245315ef6d44e1b059 SHA-256: 7237595f0e689f81314b1d6f58911b557cd27503b1cc8c95938391dce3f3ff51
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 0.9997

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://traffine.ru/123?utm_term=amazon+rainforest+anaconda+video PDF link annotation
    • https://sazunanul.weebly.com/uploads/1/3/4/4/134488017/xilawub_fajulesanijoz_pelokibub_saruxokujopazu.pdfIn PDF document text
    • https://palarijebatexo.weebly.com/uploads/1/3/4/3/134338538/27d44898411ea55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446263/normal_5fabc75a7b827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406454/normal_5f99a9ff91a78.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/ff6dadec-5697-4807-8d1e-fb004d589883/fopojirivajigilozavizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78ffd594-b800-4276-8b20-95b89e706556/mewajamufarugetano.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/tanks_2_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a62522d-d875-42e8-aaf6-5af494ccc728/92306262130.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/everfi_renting_vs_owning_quiz_answers_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ba5602d-07c8-4d08-9474-994cf515fb27/sumotejizuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/mexuge.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A3 5020 bytes
SHA-256: b34848a293834e5c9f632f24433c295db89b67a2d058a99c1bfc77dcac3949d3
font_01_sfnt_off0000e5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A2 10600 bytes
SHA-256: 73f1067a3ef1ba4f6fdbfa18c3161cf0a4f4a68cc7e4ef535e2e3fc217a4d9eb
font_02_sfnt_off000109b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B1 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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