Malicious PDF — malware analysis report

Static analysis result for SHA-256 946c4e3f538ec1ca…

MALICIOUS

PDF

75.4 KB Created: 2021-01-30 23:05:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0ca9facb6583a31a12f5b34eb76c3c1f SHA-1: f1c034c2a7c271914b800beeee9eb52e67ffe715 SHA-256: 946c4e3f538ec1cab6e5c6308a32643d18e6d8c946dc7a86380bd283779ab729
184 Risk Score

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
  • 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://yafferge.ru/123?utm_term=la+zanahoria+engorda+yahoo In PDF document text
    • https://static.s123-cdn-static.com/uploads/4446914/normal_5fe16be9760db.pdfIn PDF document text
    • http://latencfsrt.space/kpi_ppt_template_free1csqy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417313/normal_5fe4948610aca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378846/normal_5ffcc8d7365e8.pdfIn PDF document text
    • https://nelemiken.weebly.com/uploads/1/3/4/7/134704654/00a5e5bbca1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423430/normal_5ff252067edf5.pdfIn PDF document text
    • https://penogefuf.weebly.com/uploads/1/3/2/7/132740618/povonufopemigiwapi.pdfIn PDF document text
    • https://tizirawosow.weebly.com/uploads/1/3/1/4/131483061/simakakiw.pdfIn PDF document text
    • https://daseguvemorog.weebly.com/uploads/1/3/4/3/134357845/saganoropowaturabu.pdfIn PDF document text
    • https://kajubogoxin.weebly.com/uploads/1/3/0/9/130969430/3678222.pdfIn PDF document text
    • https://vonepegoparopew.weebly.com/uploads/1/3/4/3/134352316/5d778a.pdfIn PDF document text
    • https://takigufumugo.weebly.com/uploads/1/3/5/3/135345847/a7c025386c2bfef.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/6653681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488141/normal_6011aa6b455fc.pdfIn PDF document text
    • https://jedagafigi.weebly.com/uploads/1/3/1/4/131438055/xibera.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423454/normal_5fff25f34f696.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/gimisorixosu/14928480941.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/guzijesijun.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_off0000e7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A8 4968 bytes
SHA-256: 6634e2cd94373b460ceab8d18624b8ad0b8c9e471a4a84d7b9cfb417d1869490
font_01_sfnt_off0000f89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89A 11724 bytes
SHA-256: e84dab345c5ef6b5bf83c01262ea2824889c6f31b401b5a8696543caeb2f4c65

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