Malicious PDF — malware analysis report

Static analysis result for SHA-256 72dd192d9be2525a…

MALICIOUS

PDF

66.0 KB Created: 2020-12-06 15:50:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d45d1f016af76e3756f32aad7b61773c SHA-1: df5cc9a9e0cd916c6831269a9502ce0a0a4b9d58 SHA-256: 72dd192d9be2525a16e9f014a4badbf66d463b5bd446d104625232d9c34b7d12
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file that contains a large number of embedded external links, many of which point to potentially malicious domains. The heuristic PDF_SEO_LINK_FARM indicates a mass external PDF link farm, suggesting a phishing or SEO poisoning campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware.

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://trafficel.ru/aws?utm_term=nomenclature+of+alkenes+pdf PDF link annotation
    • https://weniwekozeg.weebly.com/uploads/1/3/4/0/134012595/napusolajefof.pdfIn PDF document text
    • https://pozopili.weebly.com/uploads/1/3/4/3/134310053/desan-zafoda-todibukibeser-nubudun.pdfIn PDF document text
    • https://worofinuwur.weebly.com/uploads/1/3/4/5/134582463/3806882.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/bd56a0cf-904f-4148-a292-5f8c1809b48a/tipos_de_empaque_y_embalaje_para_exportacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2760e404-82f9-4450-8270-48c3f5aa87e1/kakudelopak.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfd961491241adc45d5b4/1606221207282/kiwinonadavidirutexof.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf334edabee7b440679d5/1606218548465/nakerujuxunafure.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe75e0fa04221c71f3d79f/1606317537787/properties_of_waves_worksheet_answers_pearson_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a703f492-7fff-46a4-a8e8-8dfedb32c847/roxivavozopuxix.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eff460f2895dc1e80f14/t/5fcb0db1393ce473562d2894/1607142833760/77913183406.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e0febe9b6939510aa6a3/t/5fc0f236eaf37e3b64be0c5f/1606480439721/thelma_mcqueen_mrs_butterworth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0890592e-a878-4da3-b16c-e78ec1bf3298/fupasemoredewerejogam.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_off0000c55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC55A 5336 bytes
SHA-256: f459ea1e96001a922c99803a3ca9aebd657d864d8891410ffba1fc40b34e8404
font_01_sfnt_off0000d76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76F 10584 bytes
SHA-256: 620a15a60dc7029e75532e351255de1a5bad8f416c4303c5023be76fe65102ce

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