Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff713cda4b4abd56…

MALICIOUS

PDF

88.0 KB Created: 2021-05-23 19:12:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 624784af50f34ca7ed63ef22d69aee4f SHA-1: 50075d19028b457c213d9a149ed4338335961f2e SHA-256: ff713cda4b4abd56a434452055c53ce4b4bc437fea0b0c32330dd8a6bd12719b
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious phishing document and hosts a large number of external links, many of which are likely part of a link farm. One of the extracted URLs, 'https://jacksth.ru/strik?utm_term=excel+sheet+templates+for+project+management', is presented as a lure for project management templates, suggesting a phishing or malware distribution attempt. Although no scripts were directly extracted, the PDF structure and the presence of numerous external links, including one pointing to a potentially malicious domain, strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jacksth.ru/strik?utm_term=excel+sheet+templates+for+project+management PDF link annotation
    • https://gaxifuxizuru.weebly.com/uploads/1/3/0/7/130739475/tojutun.pdfIn PDF document text
    • https://dapasubasawesol.weebly.com/uploads/1/3/4/3/134383907/xizino.pdfIn PDF document text
    • https://bogigusojuvifu.weebly.com/uploads/1/3/4/3/134316749/7551489.pdfIn PDF document text
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/3539529.pdfIn PDF document text
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/deguwi-pagegifuzuvuji.pdfIn PDF document text
    • https://felonuwonab.weebly.com/uploads/1/3/0/8/130814100/b8f289.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/badodemebo/12082208315.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/78271892692.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/modern_family_season_8_script.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/8_ball_pool_pc_version.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/tabla_de_conversion_de_medidas_pulgadas_a_centimetros.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/zewomowoxevifelipovamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/109d8070-bd21-40dc-b8fa-c0069aa1ec44/6528694970.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/niwavupojixugenefajomifup.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/silk_bed_sheets_hanoi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eaefa48-6b44-47cd-bd50-7822f2000621/76025052463.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/85327206199.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_off000118d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D1 5532 bytes
SHA-256: 09ebb8064c83665bda7458513130f0d4cba3bfd10637f27f944b7736a0673497
font_01_sfnt_off00012b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B87 11580 bytes
SHA-256: ed635e078256ea571ed73f9f7bce4c77b3fda850e6b8ecaf210b8eaacf9f8be6

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