Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea7c02ca56b8bd4…

MALICIOUS

PDF

76.2 KB Created: 2021-04-06 19:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1db8bffee6e5e8d65ec4bc1488c5163a SHA-1: 6895a5d94fe7c2490fcb2e2c60f8d2b1afe7614c SHA-256: 1ea7c02ca56b8bd42c67240a01215cbbf2183fb7a121b8be88bcd065f136c412
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. While no scripts were explicitly extracted, the PDF structure and external links suggest an attempt to lure users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=tarot+cards+rider+waite+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444626/normal_6062f74936c69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369922/normal_600f8251e3c56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389824/normal_60566403404b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406169/normal_605fbd3d9ac95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392869/normal_60625b4c8610c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_60179627be4a8.pdfIn PDF document text
    • http://psylath.com/for_elise_piano5smaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409092/normal_604fd21d75e64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482188/normal_603c366922402.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462727/normal_605c70ce9b07e.pdfIn PDF document text
    • http://timecodes.net/how_do_i_download_microsoft_access_for_macywyjj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489587/normal_600e0d02c11fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/19609759446.pdfIn PDF document text
    • https://a35aa970-3e4e-4c20-be1f-53d10001bce9.filesusr.com/ugd/af4e73_f1629a4e53914b209a5044a8c584a94f.pdf?index=trueIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_7415e272dd3f4b199a1042ccaaba1fb7.pdf?index=trueIn PDF document text
    • https://e8ceee85-86bf-4804-80ab-d7a1511cbcf5.filesusr.com/ugd/38650a_091e3f0743d149fca59d77ed7f74be11.pdf?index=trueIn PDF document text
    • https://b8f7bc2e-5f90-466c-a76c-b8215bfdb3ae.filesusr.com/ugd/9717d9_456dc417384f4077af9fa87193ff3f14.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/xufolerepukab.pdfIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_865bc49058054868b320c3ed3de990d7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/sex_positions_book_indigo.pdfIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_8b8c7d15ebf74ce4be40e8e1eaedb6f6.pdf?index=trueIn PDF document text
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_247670b171c6424394535cc0326bed60.pdf?index=trueIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_e601c6c3ae174b53993f8328927ebe9e.pdf?index=trueIn PDF document text
    • https://8dcf3d85-40eb-4350-b789-ae6ac2c46e24.filesusr.com/ugd/21d17a_3bf9025bcceb48fb97d3030c0c4bcab4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/defipedibe/2006_yard_machine_lawn_mower.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC26 5160 bytes
SHA-256: 43675d77d545fc28144d7ef89f6253ec928b66425c42ee81c4da6054f29f2519
font_01_sfnt_off0000fdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD9 10868 bytes
SHA-256: 03b5716578fabad84e618daa8cd4fac290195e3c8859d8208187290550d34140

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