Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed721a9e9f3a04f…

MALICIOUS

PDF

68.5 KB Created: 2021-01-06 20:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: de10b57742d435f02689f65e0bf74c10 SHA-1: 79bfdf066113d9e413554aaf3c58141d1d5cde03 SHA-256: 9ed721a9e9f3a04f335a3483e5d7c0c3f5afa16742e756d54b2782674a8b65b7
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The heuristic firings indicate that the PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly support its malicious nature.

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
  • 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://traffking.ru/aws?utm_term=free+flyer+template+psd+halloween In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f87b69c2384e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375890/normal_5fa087cd3422f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415950/normal_5fc436ac1656f.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/cc20db5a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369922/normal_5fc04c12cd95c.pdfIn PDF document text
    • https://novagonuneji.weebly.com/uploads/1/3/1/4/131483078/5187495.pdfIn PDF document text
    • https://femobideja.weebly.com/uploads/1/3/4/7/134735935/983006.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/WjbHiaO/dobab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371248/normal_5fc78f4b5c4f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500910/normal_5fe9210fdbd9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426953/normal_5fa9b994c90a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f9b057829cf0.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/5728f6ee-dae3-4c1b-80f2-cd688ff3d21f/totakiwirugelejope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b20a0f2-d1c8-45c8-a22c-6dc5c517e34b/mobotupujexujix.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_off0000ccb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB0 5428 bytes
SHA-256: 3ca78641c713fd710a66d769d69f2a3d0b959cc90428d5871fd4791bd6b2f21a
font_01_sfnt_off0000df15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF15 11156 bytes
SHA-256: 814d2ce4fa5adf197aee27b85ec75760899e784a4c1e76605f591361fae4aec5

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