Malicious PDF — malware analysis report

Static analysis result for SHA-256 d58da58f77a445a1…

MALICIOUS

PDF

202.1 KB Created: 2021-06-25 08:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 28eb1ad5bb983a51f499e2cbf93fa037 SHA-1: e7f26d7da844c95cf0b8f33e95d1536358d9d48a SHA-256: d58da58f77a445a1b31dacefce26da74c71e2251986317668eb63db0e392e904
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links to compromised websites, suggesting a phishing or malware distribution attempt. The 'Password-protected archive handoff' heuristic indicates the document likely instructs the user to open a password-protected file, a common tactic to bypass security filters. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. 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 http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a32ab0da497---vobafulenox.pdf In PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d8deca5df---94946308715.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/197b735265e9f0545aa7ff0d3fc45c2e/57336466966.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/rigisakebejefubibizo.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/niralinujadumokutajog.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/pajodaxogalasusavun.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/81083820782.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/tajafetirokogado.pdfIn PDF document text
    • http://jarosi.hu/files/file/82438636232.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/gonazipubege.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/33140685c8fadc2032cc665b242dde2c/22350797712.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/j6fefpnb2t8ls3c8icqr0keio0/53588380571.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/roxuwalawakanofesijolelu.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/k0646g31omolopg25lmf8uq050/lefuluvejesubumetu.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160765e166fc1f---35794603848.pdfIn PDF document text
    • http://eakqshop.com/ckfinder/images_store/files/lolalogetamadeno.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=ps2pdf+windows+7PDF link annotation
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002cfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFAA 5000 bytes
SHA-256: d80f986b724db8de89a90730a939c00072bdacf4b6a00e7e3a07a8acd7965fd2
font_01_sfnt_off0002e0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0ED 23516 bytes
SHA-256: dbc81be696919d21987c78df2c062e63fbb30b6630954a27eb51fe0125dd75b3

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