Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d9ff36fa94ad981…

MALICIOUS

PDF

95.7 KB Created: 2021-05-16 10:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9886dff835883ce5b48ee0c894497b4c SHA-1: c44f1de95deb0a74c03ae0c75d6dacfeaa36ac7c SHA-256: 1d9ff36fa94ad981c8090f855bb86be0013ee5e34b512e50c181001bd5e4dff6
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dugedepap.ru/strik?utm_term=how+to+transfer+mobile+number+to+tesco PDF link annotation
    • http://betmoy56.com/29325476573iqtjv.pdfIn PDF document text
    • http://vipmanmarket.space/sozorujupi9yeg2.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/how_to_find_the_common_ratio_of_a_geometric_sequence_calculator.pdfIn PDF document text
    • http://jijoxep.getenjoyment.net/esl_appearance_worksheet.pdfIn PDF document text
    • http://portkamesto.site/nijekefuxepiwime6x0ej.pdfIn PDF document text
    • https://wajuzetixageg.weebly.com/uploads/1/3/0/9/130969085/9c55a.pdfIn PDF document text
    • https://natatujefeni.weebly.com/uploads/1/3/1/6/131607075/9498722.pdfIn PDF document text
    • https://kevigedevuk.weebly.com/uploads/1/3/1/4/131438682/vatoxolodenupo.pdfIn PDF document text
    • http://bridgecommerce.com/15462241778f69m4.pdfIn PDF document text
    • http://kzrovk.xyz/white_rodgers_programmable_thermostat_instructions5diw8.pdfIn PDF document text
    • http://thefortykuti.com/vscode_python_format_pep8ql2ap.pdfIn PDF document text
    • http://everydays.space/jomozeuz300.pdfIn PDF document text
    • http://krokoboko3.xyz/yoga_anatomy_leslie_kaminoff_and_amy_matthews720qe.pdfIn PDF document text
    • https://xowonijateroz.weebly.com/uploads/1/3/1/3/131380337/pivuvif_bimuxafufavo_belalisiloge.pdfIn PDF document text
    • https://fuzakeraza.weebly.com/uploads/1/3/4/8/134848422/350388.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wojibikifi.myartsonline.com/kibizivuwazukale.pdfIn PDF document text
    • https://9f5bcc56-a059-4f00-ae85-604acd6a3d2d.filesusr.com/ugd/ac9354_094e2f59d20641a6928dfc98cef9286f.pdf?index=trueIn PDF document text
    • https://c809e8a6-5bdf-489d-8d8c-df4e4638a115.filesusr.com/ugd/45a296_9c846cac1cc941bab538bb5a63880631.pdf?index=trueIn PDF document text
    • http://supuwevul.atwebpages.com/tracheostomy_suctioning_procedure.pdfIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_66da32a2d3f742a78c3bbe41a236ba2c.pdf?index=trueIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_747381a0d6f04c9db3b6611547135589.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a862dbf-ee7c-427d-8f8c-11cd4a524edb/anti_deep_freeze_v_0.4_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f70692-7b89-408a-b5bd-9145e6d6fd4b/27522374910.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_off00013639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13639 5220 bytes
SHA-256: c57c95ed59b907626ae9b5ed737c6e2e5ba3436026c9aaab2ae289595243ef32
font_01_sfnt_off000147f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147F3 12012 bytes
SHA-256: 6c18151942c9b9e55c006bf6735021cb3cc13b20cdebcedb9ae933543101e82a