Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9725c9db0c6968…

MALICIOUS

PDF

64.2 KB Created: 2021-02-27 22:37:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: af53da07dbdfd8e0a7437d955208b44a SHA-1: c9092d7bec09ba5d13b71e35358331f1a77fb83e SHA-256: 9f9725c9db0c6968e9d21e78923cf7555a5e2919e33b79d7cf16601f8007fe36
184 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'How to turn on wolf oven', likely intended to trick users into clicking malicious links. The presence of numerous links on disposable hosting and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

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 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.
  • 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://crophysi.ru/strik?utm_term=how+to+turn+on+wolf+oven In PDF document text
    • https://fuvedomuwipiw.weebly.com/uploads/1/3/1/6/131636935/zerovapusitonu-rorafug-nolofutado.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/ezdiggi/fuwizumipubupiwakola.pdfIn PDF document text
    • https://cdn.sqhk.co/jemowevu/hhdyicn/tugiruwufa.pdfIn PDF document text
    • https://xinofebew.weebly.com/uploads/1/3/5/3/135305957/wufifo.pdfIn PDF document text
    • https://xuvuvigaxopezut.weebly.com/uploads/1/3/4/7/134721928/rapab-gojod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403687/normal_5fd5f078d0ff2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446491/normal_601eca81b457d.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/hcjjjhP/matrixyl_3000_serum_uk.pdfIn PDF document text
    • https://wulapoledonuker.weebly.com/uploads/1/3/2/6/132695240/zurimizaziv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409098/normal_5fdd8a998555e.pdfIn PDF document text
    • https://cdn.sqhk.co/muxigatatini/Tm9hQQj/babivebewujumirikij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366969/normal_5ffa0a875009b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419430/normal_5fdf5821e0bd8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bimegisekew.epizy.com/texto_expositivo_argumentativo_estrutura.pdfIn PDF document text
    • http://xisuferixap.epizy.com/30979670545.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/sededagi.pdfIn PDF document text
    • http://jazupizewatabal.epizy.com/wafeluzomapomoj.pdfIn PDF document text
    • http://penixip.rf.gd/google_docs_calendar_template_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/the_woman_in_the_window_movie_trailer.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_off0000c3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3BE 4484 bytes
SHA-256: e360930d321f09eb9e29164c35c2e3165f42d06594a4d1b7502ce723e842a3fa
font_01_sfnt_off0000d31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31F 9600 bytes
SHA-256: 4d39530d06a949ef09c3d13564d285d105f4e3fa7b58ab251e72a49721d25507

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