Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef0d7911138de21…

MALICIOUS

PDF

84.3 KB Created: 2021-04-09 01:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d14eef0593b7498c94052b4cb649374 SHA-1: 61909c3ad4190e49af701aede5c38ba4b7771a75 SHA-256: 3ef0d7911138de21c996f5b12679da629715b6ba564b0840363f8cb174aa55f1
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in phishing or SEO spam campaigns to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful content, possibly for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=how+to+renew+my+license+by+mail
    • https://kipunazumalimak.weebly.com/uploads/1/3/4/7/134755782/dexixesilaz.pdf
    • https://cdn-cms.f-static.net/uploads/4498376/normal_60458098743f6.pdf
    • http://fineagencyy.com/kodeviwi4ik0s.pdf
    • https://cdn-cms.f-static.net/uploads/4410204/normal_5fd1f18b31f23.pdf
    • https://mofomajem.weebly.com/uploads/1/3/4/3/134349017/mirorakexubate.pdf
    • http://urologo.store/bewadazufegivaliwixememeswrh3s.pdf
    • https://jironomazubem.weebly.com/uploads/1/3/5/3/135393756/d3bf20f6b7d.pdf
    • http://dontbeshy.xyz/acls_cheat_sheet_2017wu5rn.pdf
    • https://fuwudasex.weebly.com/uploads/1/3/1/0/131071129/nujaboje-mitedu-mimuse-zopuviso.pdf
    • https://cdn-cms.f-static.net/uploads/4420029/normal_5fdc3edfd840e.pdf
    • http://motivawka.online/turbine_isentropic_efficiency_definition3ozz1.pdf
    • https://cdn-cms.f-static.net/uploads/4378607/normal_6056e5f122c9e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_5abd8ef3f5d5452c8a69b642a6d783ed.pdf?index=true
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_78456a9950414617971be16b2106f0e4.pdf?index=true
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_21821f319fd047e09a16f7a43b5335ef.pdf?index=true
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_b65a4e5b44004e51825ae7978e50dcee.pdf?index=true
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_3494ae1f16284d4e91645c8ee04629dd.pdf?index=true
    • https://s3.amazonaws.com/xalexojaxipud/1441546543.pdf
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_853380c4072348e18e889b11369b0b8d.pdf?index=true
    • https://s3.amazonaws.com/buwosevax/kubokoxamezafuli.pdf
    • https://5926284e-b61c-4ed0-95e5-27b9feedd2c3.filesusr.com/ugd/50c35f_66b2de8d844d413ea3fa59d483935917.pdf?index=true
    • https://s3.amazonaws.com/juzewojavomofew/libertango_khatia_buniatishvili_sheet_music.pdf
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_875b69580d9c4983b0471a1703e1c5fb.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff48.bin
38edd7fad36f20b6d46191f0f320c13000de40f4e295efeef6105628d8462717		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF48 5028 bytes
font_01_sfnt_off00011052.bin
a55d4d6b2a17edcfa84d09aecf78c891e2fa8aea20636cc8a7df8fc221abe7f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11052 10880 bytes
font_02_sfnt_off0001353e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1353E 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.