Malicious PDF — malware analysis report

Static analysis result for SHA-256 c217019597293dc9…

MALICIOUS

PDF

82.4 KB Created: 2021-03-16 22:01:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6c4c92bc5ff1286ee6a56aab44301892 SHA-1: a8dcbbe7219efa78947e3c196f96562e7006c06f SHA-256: c217019597293dc908f553083bb11c75477224c507489ba654ba9edcd25089f9
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The file contains a large number of embedded external links, a common tactic for SEO manipulation or directing users to phishing sites. The presence of these links suggests the document's primary purpose is to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=action+speaks+louder+than+words+essay+wikipedia PDF link annotation
    • https://xilasofuvi.weebly.com/uploads/1/3/4/6/134651230/dabaxikuzu.pdfIn PDF document text
    • https://cdn.sqhk.co/joxusozomilo/igisqMw/background_photos_hd_new_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/balapakufogo/DjjpieR/71636756989.pdfIn PDF document text
    • https://cdn.sqhk.co/pajegili/sIshgnF/rekemizofozowolexu.pdfIn PDF document text
    • https://cdn.sqhk.co/korulifesewa/mv8gfjj/kiwepidavesipivufevo.pdfIn PDF document text
    • https://jojapewabivato.weebly.com/uploads/1/3/1/3/131379205/9810536.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/ac88f8df-5d38-4895-913d-a74bb3f451e7/faviridulawelifomugak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac727cd0-4af1-4306-9339-9d89febe07d8/gigivadoviburivujidore.pdfIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_2a9f641dd04c4beb92d38852aade97f3.pdf?index=trueIn PDF document text
    • https://a49a6154-edc8-4132-95a2-c7bb8d673fe9.filesusr.com/ugd/551169_c684c279b65842eab36087d4e6a40e83.pdf?index=trueIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_ef50ecb45f1d49a5a62069c3cf84e0e7.pdf?index=trueIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_0f14877014af4e22b7c0bf523ac4da7d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b81c835-0632-435a-ac6b-f6fa4c925198/mumub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99fac16c-7e60-4e54-bd78-c90a553326e2/castor_y_pollux_los_juegos_del_hambre.pdfIn PDF document text
    • https://0115c081-d8bc-4983-a705-81db93bf1442.filesusr.com/ugd/990402_2ee134ee066344fcb04bc3938d9f3dcb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/32e5d2b7-fc89-4d49-8cb9-d896a1c91b59/31172648282.pdfIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_b30b59693620412c8e76763ea7509da3.pdf?index=trueIn PDF document text
    • https://bea00909-aa88-4d38-ac88-e56db460b486.filesusr.com/ugd/923104_d2ac1c9e5c7e479b8ccd83bc5e07b395.pdf?index=trueIn PDF document text
    • https://fab88ded-2f12-46c9-b6ec-f290036286cc.filesusr.com/ugd/cce69c_480ae14ead844f5a85a84a304f52c5a8.pdf?index=trueIn PDF document text
    • https://313cea95-bd78-4864-9d9d-3b26c3bbe0bd.filesusr.com/ugd/2142af_5c5600280f5e4f41886c3246841b6d85.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BC 5408 bytes
SHA-256: eaab5ffacebe1d901b6a0b99866d64e7cbec6cb2c853115c3f333082f9afdabd
font_01_sfnt_off00011637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11637 10636 bytes
SHA-256: 21b9f347652e50375709fcf7eb6695314b494abfeb586f33d638109548db7750