Malicious PDF — malware analysis report

Static analysis result for SHA-256 3180ee69a8654881…

MALICIOUS

PDF

85.3 KB Created: 2021-02-18 17:17:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8e48e96850e56ed3dce11b2595663136 SHA-1: fc95aad229f264eece5b49d3b215c6833bfdb910 SHA-256: 3180ee69a86548819fd5d1b3625b5cfb0d971df915e15871c8bfed8f4e6e6bd4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM' containing 30 external links. The document body, though partially corrupted, suggests a lure related to Google Earth property lines, which is likely a pretext to drive traffic to these external sites. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or SEO spam.

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://seumenha.ru/123?utm_term=how+do+i+get+property+lines+on+google+earth PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388405/normal_5fdb8c4b6d749.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445890/normal_5fcced8dee221.pdfIn PDF document text
    • https://xojajulu.weebly.com/uploads/1/3/1/3/131382271/ddb1bd4a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403540/normal_6021aa1e720c2.pdfIn PDF document text
    • https://lifezudo.weebly.com/uploads/1/3/0/7/130739479/ca413528.pdfIn PDF document text
    • https://cdn.sqhk.co/dosazuleg/gPmCsQR/wesutopi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450635/normal_5fdf49880c030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405440/normal_601e38be18ad2.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/zurovajij/goldsmith_leveling_guide_ff14.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/can_you_afford_to_retire_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/android_oscilloscope_circuit.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/bpmn_diagram_template_visio_2010.pdfIn PDF document text
    • http://silapopo.epizy.com/1027882646.pdfIn PDF document text
    • http://fopekexu.epizy.com/20532383861.pdfIn PDF document text
    • http://bexinoj.epizy.com/48356753132.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_off000110d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D5 5376 bytes
SHA-256: 8f1824b475ad16d4168fe8de87ea6864a1f69b34c39c7b80b2f9ddfdfb0313e9
font_01_sfnt_off0001232e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232E 10912 bytes
SHA-256: 043a4765e5ac62cf30cb2f725b99357855f039fe02d297dad71ab94a22cfd07e

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