Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb39a42b63b7881…

MALICIOUS

PDF

85.3 KB Created: 2020-11-29 18:46:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cdd2bada452bd6ada6b16caa91c3c5d3 SHA-1: 79e16fbe7e8be37e9301779d7d9302d8f6aae5ea SHA-256: edb39a42b63b78817d7baf61f86a147f281a043e66afb4618af2abfec2dbf402
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The primary function appears to be directing users to a large number of external PDF links, many hosted on Weebly, which is characteristic of link farming or phishing campaigns. ClamAV also detected it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://trafftec.ru/123?utm_term=a+midsummer+night%2527s+dream+no+fear+shakespeare PDF link annotation
    • https://xofeboje.weebly.com/uploads/1/3/4/5/134584890/a394ab302d805.pdfIn PDF document text
    • https://kefobisow.weebly.com/uploads/1/3/4/7/134733217/535898146.pdfIn PDF document text
    • https://xuxewisi.weebly.com/uploads/1/3/4/2/134235501/tipel-luwurodo-novewowumonawe.pdfIn PDF document text
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/6e709fdda73c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374700/normal_5faefa7d01327.pdfIn PDF document text
    • https://nipefewemaxu.weebly.com/uploads/1/3/4/3/134387654/xamafovigufowoso.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/satuja/kojepopulafelakot.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/26303907627.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/logistics_coordinator_job_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/celebrex_dosing_information.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/jazz_blues_piano_licks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b91a872f-9517-4467-99ec-6abf77a13bfb/ms_dhoni_the_untold_story_full_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79fe7314-188f-4d6f-9588-626b919f23b9/libro_del_maestro_desafios_matematic.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/goodyear_assurance_fuel_max_bw.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_off00010e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5A 5508 bytes
SHA-256: 145bc89bfab84cc17588b167a45b2431745729c6cf9b6e13294f9e882f69da12
font_01_sfnt_off000120f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F8 11472 bytes
SHA-256: 9e640789518003304733d2f140d5813b60c88fc8f83c246fa1f33518c7af4329

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