Malicious PDF — malware analysis report

Static analysis result for SHA-256 1764dd52fe34e7b2…

MALICIOUS

PDF

89.3 KB Created: 2020-11-24 11:05:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5966a78523fe37c8bbeba6b0c0826be7 SHA-1: 148eb6afd8010e2d9aaf06d9f8cc96d2ba84c2e6 SHA-256: 1764dd52fe34e7b227a391efe931cb5bdc235110276c1fc11cd65e526b38bafb
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 0.9994

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://trafffe.ru/123?utm_term=skyrim+maven+black+briar+marry PDF link annotation
    • https://kigibituridugu.weebly.com/uploads/1/3/4/3/134352406/xinoke_lefuputu_vajevumaxunakir_suxufun.pdfIn PDF document text
    • https://zikawudewodag.weebly.com/uploads/1/3/4/5/134585044/xuzomawazoxelofenap.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/45428c13-6607-4dea-949f-bc8d1b1f5728/39136427477.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/latin_english_derivatives.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/xulezu.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/82324182007.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/jane_o_brien_bbc_news_bio.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/vmware_free_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fe766d2-d999-4ffb-8e98-e494c57cc721/vuvuk.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/wii_wbfs_manager_64_bit_3.0.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_off00011097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11097 4832 bytes
SHA-256: df116d81bd80704887b8d0e019d432a1b8371af5e194276ea8c01518081bbc4b
font_01_sfnt_off000120e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E1 12172 bytes
SHA-256: c08eacd1d904c5fd24d74283e563e30e7b57009a4e5df1b1c4141be411d2e7be
font_02_sfnt_off00014860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14860 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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