Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d0bd57eb1a5b71…

MALICIOUS

PDF

134.5 KB Created: 2021-05-29 18:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5f597ca877d362354153dcadd9c5dd71 SHA-1: 098de525f3997736e7ceeabc731c5bab95b92d13 SHA-256: 00d0bd57eb1a5b71be1553acbfca0e75dcca108425c2afe0d577b3008c8cdaa4
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely lead to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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 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.
  • 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://maypoin.ru/strik?utm_term=minna+no+nihongo+2+lesson+26+to+50+pdf+vocabulary PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421341/normal_5fc63bf281c6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464068/normal_5fe0ba8dda234.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366050/normal_5fde0fafd1363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489412/normal_601fe1d0e1798.pdfIn PDF document text
    • https://jerepukiw.weebly.com/uploads/1/3/2/6/132681878/fopatiwiwokof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381297/normal_60486c346b5c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378830/normal_5fdaba5fe008c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385434/normal_60356c3b7b50e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480182/normal_601114f149bf1.pdfIn PDF document text
    • https://bunogijadijis.weebly.com/uploads/1/3/4/8/134896562/1283344.pdfIn PDF document text
    • https://sivubatololux.weebly.com/uploads/1/3/4/8/134850937/2f24393.pdfIn PDF document text
    • https://piwunosorelid.weebly.com/uploads/1/3/4/5/134590209/desegetuwiv_kerudama.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491439/normal_5fcc61a9e5121.pdfIn PDF document text
    • https://gatofofuxiwiv.weebly.com/uploads/1/3/4/2/134265530/penelumi.pdfIn PDF document text
    • https://diborukokaw.weebly.com/uploads/1/3/0/8/130814192/sigunefo-dogoxomid-simukosilumu-bapaketodaz.pdfIn PDF document text
    • https://vabomunebalobi.weebly.com/uploads/1/3/1/8/131856010/ad9c8a19e2ec071.pdfIn PDF document text
    • https://gagavupotiwek.weebly.com/uploads/1/3/0/8/130813998/tupotibovanit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_600f54c27ed3d.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/82d3a395-1ee2-4a62-9f0b-52688d622ba8/39671787946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af9e69e6-ea67-491a-99f6-8386f6110f42/business_intelligence_analyst_salary_indianapolis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a966c15-13c6-4b7e-9e73-d73cd7e26688/fogixobufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a9a55a9-9f42-4af8-b88c-ffe2795e66a9/black_and_decker_jigsaw.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.orgIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8A 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off00010d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D41 51904 bytes
SHA-256: bc45e1b6879ec3d5f3d0687061f3032f5c20bbe2a55bf2bccca4bd8cb7c3e609
font_02_sfnt_off0001aaf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAF1 6276 bytes
SHA-256: 048344d77de2ccbb58689adfb7285acfc962540c4475c6161cad1c0e163a2ecc
font_03_sfnt_off0001c064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C064 10472 bytes
SHA-256: 8f66d41f36e2f091623e045840bc300984cb9a69749ce0c69278f6b111451756
font_04_sfnt_off0001e49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E49F 16088 bytes
SHA-256: 3952c7ebc27cb37eb171826bfaccb5ad116e137fe9c4f163139ea0adcc2746ab
font_05_sfnt_off0001f996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F996 5400 bytes
SHA-256: ae89daecdcfe4b52ee66dadc6eded6acf24db80a7b53362b1b4207c269744fbb

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