Malicious PDF — malware analysis report

Static analysis result for SHA-256 84bd7c342a8e396e…

MALICIOUS

PDF

73.6 KB Created: 2020-11-19 22:45:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e83906cd368c57aa36a6f38d323e3ced SHA-1: 9d6fc9ff0008de9e704ced5d520d935dbc2f4539 SHA-256: 84bd7c342a8e396e149ae7440028447e27de000e3283973202992ba026c1eab1
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to a sailboat for sale, likely a lure. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/strik?utm_term=banshee+sailboat+for+sale In PDF document text
    • https://futokiwusilo.weebly.com/uploads/1/3/4/4/134458686/sunonetu_xexutu_putojag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380705/normal_5faec5c51ca0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403415/normal_5f9e403200255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5fb2f86faacc0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tipikaxe/ck12_org_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/formato_de_acta_de_reunion.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/81095696866.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/carers_payment_medical_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b300a3c2-6bd8-4656-b4c2-3490c15d6b06/jagazidoluwupawibaneni.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/pefazozoxerewivefi.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/frases_de_aliento_para_un_amigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fa17220-f948-4475-9e72-7003d17345f0/menoetius_is_the_titan_god_of_what.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/39053271241.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/adobe_acrobat_reader_9._1.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83F 4832 bytes
SHA-256: 7e4180065b1c400de7d1f84e12de04ba72dccae3039f360e70139c482ef02fad
font_01_sfnt_off0000e890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE890 10244 bytes
SHA-256: 98125efc58a014ed8b8fcd5a509477f9548937fbdbb3c6dde15f336f5a2eb12a
font_02_sfnt_off00010b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B96 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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