Malicious PDF — malware analysis report

Static analysis result for SHA-256 85218394a2272e05…

MALICIOUS

PDF

69.5 KB Created: 2020-11-19 17:49:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7aa98e3dff4af0b883ca28c61276143e SHA-1: d50ab7869e8b613ae185487bacdc1709efc0e5c0 SHA-256: 85218394a2272e05f97c5d5db75b850752c0082077a95eb74707a690f630e95a
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://traffnew.ru/123?utm_term=astro+van+dimensions+interior PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368488/normal_5fab572c22cec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5fa6e365f2ca9.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/ebad0.pdfIn PDF document text
    • https://pedudevapo.weebly.com/uploads/1/3/4/7/134719514/poxekevofagakisoze.pdfIn PDF document text
    • https://mixosikopas.weebly.com/uploads/1/3/4/3/134383158/59a55b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462339/normal_5faa0bf101fd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f86fc5c911cd.pdfIn PDF document text
    • https://retujesa.weebly.com/uploads/1/3/4/5/134529196/satogujurukob.pdfIn PDF document text
    • https://xajoxivanuxus.weebly.com/uploads/1/3/4/4/134432241/nazekanisikepo.pdfIn PDF document text
    • https://tolafapod.weebly.com/uploads/1/3/4/4/134486806/jetaw-foguwuxoja-tixuzi-zanuxizomadur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415930/normal_5f9e067dbeb51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f8fbbeb01065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374533/normal_5f968e358b921.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD429 4988 bytes
SHA-256: 048a7ace5aba6849360507ee8a9dfd924daead39c046cae1ea6e030e0054c2e4
font_01_sfnt_off0000e511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE511 10664 bytes
SHA-256: ab572df3dd12e42e11b6fe4deefb7c75c9491ac5e05458cf6bf7da2c85b9d6b1

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