Malicious PDF — malware analysis report

Static analysis result for SHA-256 b530b60494bff0fd…

MALICIOUS

PDF

83.6 KB Created: 2020-11-25 20:13:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5ddc4d5dd05a794ce8a8319d20a60175 SHA-1: 7c4daa744cf173b4da61989d6f0c733e90f76abf SHA-256: b530b60494bff0fdd792069bfd2ee85d6e65b408236a7f64063124952d8ad5f0
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document contains a large number of embedded URLs, suggesting a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness, and ClamAV detected it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=sentencing+council+scotland In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f93ca8976c45.pdfIn PDF document text
    • https://dutazoduduniluz.weebly.com/uploads/1/3/4/3/134314841/f67faf07562587a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375087/normal_5fb405ba1478c.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/75e6f2c5-9efd-47bb-890d-59f2656b39a1/nfs_most_wanted_apk_mod_1.3.112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a14cb56e-5d11-4c50-ab28-5a4c5b7ad7a4/39852203185.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/wurokajivitununaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8faddba6-6b79-40ab-8162-1dbad25e9839/72888122773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89a9ecfe-3697-4e10-99b1-7fb9791c0765/travel_planner_excel_spreadsheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f058ead-a85f-4f53-80d3-d7fe9251c856/nosetemaruzetexilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d793d60d-f98f-4f4f-bbe9-aaa47b15311e/nizuxurenotaloretose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/376d8d61-8d76-43bc-91bc-0b60490c8dcb/bruni_karr_agency.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2d8a863-4fc7-40fe-93fc-2be3debadc36/10588243114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11553748-de17-43be-99d6-efed53eb3bf2/67169393780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3d993ec-2761-4498-bedd-1c4cda59164a/57457226484.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_off0000fcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB0 4996 bytes
SHA-256: c42fb612b7810cfec3c8b2c62a17491d412f7b540471d1b9a96322055b38206f
font_01_sfnt_off00010db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB7 10948 bytes
SHA-256: 00aea6582ca411dfb6e99527807ff56e7f9e672a9e5115bad2a4a981ffa41e72
font_02_sfnt_off0001330a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1330A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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