Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ee402d7940e99f…

MALICIOUS

PDF

85.2 KB Created: 2021-03-19 16:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b789692b79fa280a8e18c8e923ab711 SHA-1: d1e8fadf503e2f99ce2c8ffcb0e8eeeb48a37097 SHA-256: d3ee402d7940e99f117869580008583f7625a43f01a08ca5444a1b4638072bfe
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a site that appears to be a link farm designed to attract traffic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/wix?keyword=tactical+battle+simulator
    • https://xidelesa.weebly.com/uploads/1/3/4/4/134498911/dilefefal.pdf
    • http://sowivonowiso.iblogger.org/85784567112.pdf
    • https://peninugeba.weebly.com/uploads/1/3/4/6/134666339/4649700.pdf
    • https://tiketutowiko.weebly.com/uploads/1/3/5/3/135345961/3725420.pdf
    • https://mejatuwunuzawe.weebly.com/uploads/1/3/0/7/130775850/e170fe5c44296d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_a7dc8188418f4468a64490e73740e746.pdf?index=true
    • https://uploads.strikinglycdn.com/files/318fc4e2-d9bd-448a-839a-e9899be79708/visurawigufenir.pdf
    • http://kesibesezusede.rf.gd/41201843271.pdf
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_d06c91318bac445e81b9b991a8efdc84.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d2b62647-d545-4f28-81de-8b269eac5743/baudelaire_las_flores_del_mal_frases.pdf
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_5751fa67965047ed9e61cfb23d9daec8.pdf?index=true
    • http://dezezefisimel.rf.gd/fizebabosakowuzetikinaz.pdf
    • http://tidomag.epizy.com/cowboys_injury_report_vs_eagles.pdf
    • https://uploads.strikinglycdn.com/files/afe8ea51-35d3-4253-93c1-5f1547d24651/solving_calculus_problems_step_by_step.pdf
    • https://uploads.strikinglycdn.com/files/feb1a880-b9c7-4128-9d55-a6d298d6bbda/esv_lutheran_study_bible_online.pdf
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_d276b455be4b4c3a9f2b9bb6b140648c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/eb379cf0-fdd4-4c83-b4dc-ec1782627a13/que_es_talleres_educativos.pdf
    • https://uploads.strikinglycdn.com/files/672bb3b3-0d40-4357-9766-d74ed22ab0e4/jepaze.pdf
    • http://guniwazozosuriz.rf.gd/mupun.pdf
    • https://uploads.strikinglycdn.com/files/c732ebf1-b90e-4f23-adaf-4522d6d9b1db/goketo.pdf
    • http://banumekopi.epizy.com/zogevorutujebenot.pdf
    • https://uploads.strikinglycdn.com/files/84a02098-c6e6-4a89-9407-e580abd8bcd9/14872935919.pdf
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_99840b3683c1425784759d4802417e78.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d8fe4ab9-b585-4473-9a49-9ef403cb2e9e/59276843103.pdf
    • 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_off00010315.bin
c6fb539159ecdb7a4ccea80baeb8d4c83b04b3f6fd73881d40475f85e3b0d6cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 4808 bytes
font_01_sfnt_off00011365.bin
113d1552ad7a1afdf9d4caa35ee10fcc6b73528882b583fdf338bf981ce5b57a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11365 11024 bytes
font_02_sfnt_off0001392f.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1392F 4324 bytes

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