Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2aae75aaa441a0f…

MALICIOUS

PDF

58.8 KB Created: 2020-12-18 21:21:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3530bf47a55b25ee22bb16155750fe25 SHA-1: b80a75dcc8d292596b3190fc837f75b6ac452bd3 SHA-256: b2aae75aaa441a0f85619578d894d97bcb6815855fff828b6aa32cb0c7d247ff
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://traffmen.ru/123?utm_term=kawasaki+kx250f+owner%2527s+manual'. Additionally, the file exhibits characteristics of a PDF link farm, with numerous embedded URLs, some of which are also flagged as potentially malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://traffmen.ru/123?utm_term=kawasaki+kx250f+owner%2527s+manual In PDF document text
    • https://guzuzixud.weebly.com/uploads/1/3/4/3/134357052/63bea6fc618a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458161/normal_5fd6620d679be.pdfIn PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/feravanobafi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f8bd7c16dfd4.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/c9ffabc6-03f0-4ce1-a5e1-b9658c55eb41/personality_number_8_the_challenger.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/62096257757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16c602e-67ef-4569-84d1-254f852cb358/free_hooponopono_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a683b212-6c8c-485e-a829-df1e7054926f/cells_and_cell_organelles_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/64444353744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6bedaa5-872a-445d-8377-3889097c1ec2/dowojevazubizalazako.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_off0000ad78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD78 5536 bytes
SHA-256: 59d6cb6d1287a9a832c410d7b7297febde741cd47d888a2634e9b6428f4db98b
font_01_sfnt_off0000c05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC05D 8872 bytes
SHA-256: 31b799265779ecb7d05cc411b2fb8fdbb49c2fc5e975c1eb9c85cc36ba2aa0c5

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