Malicious PDF — malware analysis report

Static analysis result for SHA-256 50d488515083c682…

MALICIOUS

PDF

72.2 KB Created: 2021-02-11 10:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 486dc6e95e42d99dd0d075cbeff8b31b SHA-1: 3c0593ecac714dae3124311ef98886bfea8c9b00 SHA-256: 50d488515083c682b8061b6bfce3e9cc148b01613c2bd1be345e98c4f2c16f5f
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO farms or phishing lures. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external PDF links, suggesting a malicious intent to redirect users. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attack pattern involving redirection to potentially malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://druttle.ru/123?utm_term=exclusive+agency+listing+definition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426090/normal_5fe7a14a4c828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393489/normal_6010e452a8b23.pdfIn PDF document text
    • https://bolifalaloken.weebly.com/uploads/1/3/1/4/131438202/e8570507c.pdfIn PDF document text
    • https://vorusasu.weebly.com/uploads/1/3/2/7/132740845/63b496e047a961.pdfIn PDF document text
    • https://wutupebepa.weebly.com/uploads/1/3/3/9/133997315/kuselawufakede.pdfIn PDF document text
    • https://lizameguxif.weebly.com/uploads/1/3/1/6/131606128/6342233.pdfIn PDF document text
    • https://vibakifekapob.weebly.com/uploads/1/3/1/3/131398015/5183481.pdfIn PDF document text
    • https://wenudujajavu.weebly.com/uploads/1/3/5/3/135318124/jikadifutena.pdfIn PDF document text
    • https://kexiwiwimibip.weebly.com/uploads/1/3/1/3/131379584/xigukodidejisivi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456666/normal_601adcf1ea5e3.pdfIn PDF document text
    • https://tiruvodeg.weebly.com/uploads/1/3/4/8/134892329/xisofewukuxamig-fuvosolevamiz-laroforebe-jetiwuzesedok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5fd78c575d03d.pdfIn PDF document text
    • https://kufobuzu.weebly.com/uploads/1/3/5/3/135330794/pewaxorak.pdfIn PDF document text
    • https://vovavurag.weebly.com/uploads/1/3/0/7/130739927/ritizoxasepezesev.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/jezekemunidup/sanowijuw.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/xulolidasakife.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/lorekinojidapotuwurepubuv.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/vonibejube.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/fixalukegujiv.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/32179857548.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/filmywap_2005_bollywood_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/gagesefilevozivebiluvetaz.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_off0000de69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE69 5280 bytes
SHA-256: df465374db39b28ec94fb5f695cc27cb746d20cdea067a8e75eda3b61fafbf89
font_01_sfnt_off0000f08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08B 10160 bytes
SHA-256: b40c23632b91f62c48dc6993239d798593cbdff17bc32495734c3e3e6391aacb

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