Malicious PDF — malware analysis report

Static analysis result for SHA-256 adac67e68b3097d0…

MALICIOUS

PDF

76.7 KB Created: 2021-02-25 03:05:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2288ef3b6bfefc99301712250cbb0301 SHA-1: 5ec824d77fbba1b21513ad342fd21dddad3a3fe2 SHA-256: adac67e68b3097d066180a8457a1790d01588dc2e9c8b0edfc80fb1b1a26a6d1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, many pointing to PDF files hosted on various domains, suggesting a link farm or redirection mechanism for phishing or malware distribution. The embedded URL 'https://leonvi.ru/strik?utm_term=how+to+hook+up+a+polk+psw10+subwoofer' is likely part of this malicious infrastructure.

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://leonvi.ru/strik?utm_term=how+to+hook+up+a+polk+psw10+subwoofer PDF link annotation
    • http://sefesipodaj.22web.org/pegefumovu.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/samaloja.pdfIn PDF document text
    • https://xufaxasevejanog.weebly.com/uploads/1/3/4/8/134886042/tavow-fowip.pdfIn PDF document text
    • https://joxuripuziw.weebly.com/uploads/1/3/4/2/134266010/kofimigekijoguzezago.pdfIn PDF document text
    • http://tigesonepovar.66ghz.com/70251174485.pdfIn PDF document text
    • https://fiwobezamarevev.weebly.com/uploads/1/3/2/7/132740324/a20f50.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/42903272034.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bifovigavij.myartsonline.com/xaxakipogofip.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/poxilagixope.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/zevivafuwafululagalaku.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/razer_blackwidow_ultimate_key_layout.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/ziwuwonewovigafabad.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/diploma_doc_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/wuduvajaxe.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_off0000ed1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1F 5440 bytes
SHA-256: fde6d99a2f07c4391f37492c16bdfc9e83e2774e27c70e78be6a7075e9333a47
font_01_sfnt_off0000ffa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA6 11044 bytes
SHA-256: a2adc69760356507f5570ca1dd9b0445115bed3277b0b07401930e2ff47044b0

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