Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd18504fee689ed8…

MALICIOUS

PDF

79.9 KB Created: 2021-04-08 00:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b947867b4edbb18dd96e9ba96d24253d SHA-1: 3aac085fbe776901a77e1b133eecdb7151793da6 SHA-256: fd18504fee689ed85fa7031266d23da7d65c21d519c5ee3e052802e3d7f4e5b3
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous external links, suggesting it's part of a link farm or SEO scam designed to drive traffic to potentially malicious sites. The primary malicious URL identified is vilenefex.ru.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/wix?keyword=singer+401a+manual
    • https://static.s123-cdn-static.com/uploads/4501360/normal_6007754bd1d43.pdf
    • http://zomolejefej.mywebcommunity.org/how_do_i_simplify_a_ratio.pdf
    • https://static.s123-cdn-static.com/uploads/4477916/normal_5fe18faf83868.pdf
    • https://static.s123-cdn-static.com/uploads/4470833/normal_5fce2af277c5c.pdf
    • https://cdn-cms.f-static.net/uploads/4373508/normal_605575a6b8929.pdf
    • http://siviveko.getenjoyment.net/jebidusaverufu.pdf
    • https://static.s123-cdn-static.com/uploads/4454047/normal_5ff47bfa106cf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_df167ab575d94e42b52d0ac380136867.pdf?index=true
    • https://s3.amazonaws.com/pulujolatepuv/george_orwell_burmese_days_summary.pdf
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_e74c9f2afcf34cddb2dff263755fbc7b.pdf?index=true
    • https://s3.amazonaws.com/lotibabakuj/hempadur_mastic_45881_data_sheet.pdf
    • https://s3.amazonaws.com/wetevali/66777556515.pdf
    • https://s3.amazonaws.com/ladojenefe/alberta_works_benefits_sheet.pdf
    • https://1afae0f6-9e35-4dc9-9db7-5dbf78511926.filesusr.com/ugd/afe78f_cbe84874b1604867956383fe9c2bc9d2.pdf?index=true
    • https://e7f45dcf-1957-410e-85b1-216e85a225c4.filesusr.com/ugd/a2c2bc_3ef51bf8b7854f2aa35af7811181fb9a.pdf?index=true
    • https://53860ffb-5975-4088-b838-5c82367c2827.filesusr.com/ugd/0d2908_4aecf72db318405eba2dc33dd769ebc6.pdf?index=true
    • http://kuxoxokazutuv.myartsonline.com/the_other_side_of_paradise_roblox_id.pdf
    • http://jasesazolaf.myartsonline.com/47947511386.pdf
    • https://6b52f5a6-db44-4d3e-8337-ab33c729cb13.filesusr.com/ugd/f4de5e_ca4a5bd33e7f4973a656a8d2b637fb63.pdf?index=true
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_f9776b108fe24f16891d3b8dfa4bfb51.pdf?index=true
    • https://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_db89bfb64c62401aa25010761e125580.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f971.bin
cda7f733f05bb449e74c33eb45329419d673faefd0ca3c3658fe8ff2b069b4b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF971 5212 bytes
font_01_sfnt_off00010b22.bin
c61f0a062f9f5f6a613c874108e9186579bbed742b0915853c4e7124f4787579		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B22 11936 bytes

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