Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c08ee87bd6a5a4e…

MALICIOUS

PDF

77.9 KB Created: 2021-03-08 10:52:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6e31ec1a1eff1abfe596c360e3a1ae73 SHA-1: a6d06ead8c0d69cfa4b1a0770d453b88d3c458d5 SHA-256: 6c08ee87bd6a5a4e79d4b160084539ce9f1594f74d8dfcb56de1302df071c002
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary external URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is part of a link farm on disposable hosting, further supporting malicious intent. Although no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious content within the PDF structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/strik?utm_term=conservation+of+energy+worksheet+answers+key+ch+5.3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366041/normal_601661ab0a423.pdfIn PDF document text
    • https://cdn.sqhk.co/duvetezoje/dicibtZ/78094537582.pdfIn PDF document text
    • https://cdn.sqhk.co/savadapo/gjhBJij/23442135905.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388407/normal_601b35327575f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445888/normal_602c88fb0dd55.pdfIn PDF document text
    • https://cdn.sqhk.co/jamosolil/tgjigje/84872639433.pdfIn PDF document text
    • https://cdn.sqhk.co/zosurinipin/W8jh56q/denijinizaturotuluren.pdfIn PDF document text
    • http://pikogoxo.iblogger.org/28128622668.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_d593a7a2282e4e9988818a1a2d8b3b2c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/342bc1c2-7f2b-4bad-b10e-e88e4065d545/basic_english_grammar_tamil_meaning.pdfIn PDF document text
    • http://dafotefadi.epizy.com/lg_inverter_direct_drive_7kg_user_guide.pdfIn PDF document text
    • http://delixerilebuk.epizy.com/gewuvuzifedelotitalol.pdfIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_7f62b5f9574f4cd9817088026a8fc502.pdf?index=trueIn PDF document text
    • https://57eba762-b826-4879-8d7a-7f480aba2934.filesusr.com/ugd/e89c2b_e328423825664a34b07d7e2ad717a9ae.pdf?index=trueIn PDF document text
    • http://vawolanuxoreg.epizy.com/71368028043.pdfIn PDF document text
    • http://birijigasexow.epizy.com/information_dashboard_design_stephen_few.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d23378d1-ed90-4171-bdb4-435d2baa7025/31034332284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecef4729-f084-433d-8669-ca47ac857744/29227214461.pdfIn PDF document text
    • https://3e1af3dc-cf37-4f58-935d-0a6065bc5ce9.filesusr.com/ugd/3ca236_4f3d6ce802064fa88659c65a72f942aa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54B 2900 bytes
SHA-256: a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a
font_01_sfnt_off0000ef8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8D 5652 bytes
SHA-256: b516f86fecbf4b61fbafcd64154ba1edfc497278e4a88e78c28f6c1f586858e5
font_02_sfnt_off000102f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F4 10828 bytes
SHA-256: 50209dec8681c71593bfedd052d9dde0e76d2ffe6997e6d472eaafbd7e5f8168

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