Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dae50903d1441fc…

MALICIOUS

PDF

75.0 KB Created: 2021-04-20 09:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 4adcd938215d85105ccd499291643801 SHA-1: ae5562eb2c17f612bfa2372644ce675ed1f583a0 SHA-256: 6dae50903d1441fcd0fe0b619bd55eb08fc3fa5e891926c4cd2b57399bf08048
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The embedded URLs, particularly those associated with link farms and disposable hosting, suggest a phishing or scamming attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful sites.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/strik?utm_term=life+fitness+exercise+bike+c1 PDF link annotation
    • http://1xbet-regi.site/how_to_secure_fence_to_ground0tmj9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464700/normal_5fdbb11ed63a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463308/normal_606d95f1bfaee.pdfIn PDF document text
    • http://gtomishebs.xyz/rebecca_daphne_du_maurier_hardcover48v1w.pdfIn PDF document text
    • https://jefupijoban.weebly.com/uploads/1/3/1/4/131437873/2558990.pdfIn PDF document text
    • https://cdn.sqhk.co/jokusagin/c6Ahdaj/hard_order_of_operations_worksheets_with_exponents.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/hjVZtij/live_video_call_app_download_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489994/normal_5ffe94202ea1c.pdfIn PDF document text
    • https://zoponexe.weebly.com/uploads/1/3/1/6/131606878/5616757.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_5fdc42f0dc875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482228/normal_604ce35631d9c.pdfIn PDF document text
    • https://cdn.sqhk.co/xotakuzazuf/jhb7zj8/desos.pdfIn PDF document text
    • https://jimutovila.weebly.com/uploads/1/3/1/8/131856698/5877932.pdfIn PDF document text
    • https://cdn.sqhk.co/feledigowud/hdlggjh/atlantic_fleet_commander_ww2.pdfIn PDF document text
    • https://serivuzoforin.weebly.com/uploads/1/3/4/3/134334639/zekepupawesiz_tutolulu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_f7100da4d2f1491abac2706be054a148.pdf?index=trueIn PDF document text
    • https://a1f0096d-76f5-425c-b826-5ccbd312c1bc.filesusr.com/ugd/8f8c07_81102728319941c5bd1526de4d39a330.pdf?index=trueIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_535b0016e1ad4758a84ead3102decdb8.pdf?index=trueIn PDF document text
    • https://3ecc1590-a62a-4317-9845-4395e9141a58.filesusr.com/ugd/237bf7_072399d5be594392b3571d1e866b51da.pdf?index=trueIn PDF document text
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_8a590c5b41c14871aacb98deb12feb72.pdf?index=trueIn 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_off0000ea9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9F 4900 bytes
SHA-256: c3f5ce8bb36917edd7cb8ed60c1bd1e0b4b307243f45ed8fa0af6e697c789fb6
font_01_sfnt_off0000fb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB71 10472 bytes
SHA-256: 52a7d9f8ed7de813da147d3d8a5c2c367de9956298e099ffa62e987428adea83

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