Malicious PDF — malware analysis report

Static analysis result for SHA-256 0068570b41754c93…

MALICIOUS

PDF

70.6 KB Created: 2020-11-10 11:56:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 08e9a91722ad3c8bacc1e77db907595b SHA-1: 885c5168993f1e5661a0f83d3032a14a301f81ae SHA-256: 0068570b41754c93f351c1491fad4f2c8cbe690426cb8aac6b340f2aaca173f6
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-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://trafffe.ru/aws?keyword=license+plate+template+psd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f89734354a83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393502/normal_5fa38be34b85b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392658/normal_5f8e7dcbaca25.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/35bbcfee063.pdfIn PDF document text
    • https://seroselek.weebly.com/uploads/1/3/4/6/134636573/fac18649c78845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5fa5c4d3953a5.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/nitirew/73618611324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd7c686-a92c-46bf-a70b-584ade9cfb66/puxarawukizerawubavadaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3817d0f2-e2c9-4438-b16f-7f426b578001/62188024302.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/28062959099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04d84213-8e93-4730-8154-49e42dabc667/faluz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26ce14f4-affb-4753-89e1-259229efef7c/81588661589.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74b09cc4-ab09-4f88-9293-87b3551d9904/29826459482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b72b537-c5bb-45d1-9d5e-d5c2d21f245a/720_degrees_of_knowledge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96fa3f4c-e53a-4825-932e-fcd77ca9e5c2/electric_circuits_nilsson_and_riedel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf8fc31b-9c35-42a6-897c-40605d4d62ed/jenuvamitenadowuxifo.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_off0000d687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD687 5064 bytes
SHA-256: 34f459a39adcdcd004984e1a56636c0e15c6f0cbf04910b71f8d7d218d03076b
font_01_sfnt_off0000e7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B5 11100 bytes
SHA-256: add93f69251411fd9a267e19a2e3cc4c9a727f9566257cf567b64eac4a856979

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