Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc84ac8da7ad43b…

MALICIOUS

PDF

80.1 KB Created: 2020-11-18 15:13:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 648f184f40d75c4c2e79aee92a327774 SHA-1: dd4d13f2892259d415b914f5f3fd216061105324 SHA-256: 5dc84ac8da7ad43b137f8ff04bf17359fd5a6e78fd2a8b934d7c2b6e2d8d6ff3
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://trafffi.ru/123?utm_term=d3+rift+farming+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392862/normal_5f90563e4622b.pdfIn PDF document text
    • https://bawilawuvibowe.weebly.com/uploads/1/3/4/4/134401702/nekisofizagusimu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418185/normal_5f9f0b8f30405.pdfIn PDF document text
    • https://dunojezeb.weebly.com/uploads/1/3/4/5/134586234/rajabusoverawase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5fa4eb117ba70.pdfIn PDF document text
    • https://dativabeduzepid.weebly.com/uploads/1/3/4/5/134587085/dugeberokir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a47332-577c-4c0c-ac3c-e11bead906d3/vazitebij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd3df937-d284-4547-8aca-a9f80f600a2e/64646428284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a8bf1d8-4334-4863-8375-e4cf495342bf/15495686158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/121991b0-6781-41db-b05c-41612d2c9a03/51749885267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ebbb1f5-7942-4567-b4d6-3f1ce7e90fbc/mekigasodiruxupevegale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53b68f5b-c180-4bcd-8826-cc2099c50581/32188317954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a4b8769-b60b-43eb-98ec-e8abf9f0f91d/81411902388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eefa1fd8-8b80-4d72-a62c-3f0498af214a/lirefisasasepulitim.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_off0000f333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF333 5180 bytes
SHA-256: 6d5b1886485b006ba26c07c42422c0be42562d883c095fb85014e4df599c4b67
font_01_sfnt_off000104be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BE 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00010d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4B 11164 bytes
SHA-256: 4d222bed45b8069a0413baa5cfb77c3b4a0bbec21232f5c80da3c2490831d808

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