Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2369f7605cf957…

MALICIOUS

PDF

79.3 KB Created: 2021-03-14 03:23:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 206aeb8476b39a7b893183d8e6b74f16 SHA-1: 8edecd96d5e2479cdf76b2828fd9f7d2e927cf2a SHA-256: 3d2369f7605cf95744228b67689f478d60fd6aa7e685cd8aed4d3be0a558c84d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://bologen.ru/aws?utm_term=how+to+find+compound+interest PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409255/normal_6016f639b6b72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386089/normal_6015ccc7268df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413712/normal_60140df734481.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410956/normal_60020fcf72d47.pdfIn PDF document text
    • http://nanolenka.xyz/el_caballero_dela_armadura_oxidada_analisis_psicologicoeyr52.pdfIn PDF document text
    • https://jufozawuvinuxak.weebly.com/uploads/1/3/5/3/135326647/7683531.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460690/normal_6045fd1f25da2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480383/normal_5fdbceef3987f.pdfIn PDF document text
    • https://medotufise.weebly.com/uploads/1/3/4/5/134512565/juwideruxapo-fesatev.pdfIn PDF document text
    • https://zulijijala.weebly.com/uploads/1/3/0/7/130740393/nubusorewudidaxidi.pdfIn PDF document text
    • http://nadahul.ru/zolapibalokagipawet10gmy.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/risisipajole/25163891610.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/explorations_in_core_math_8th_grade_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f6e7f2-ebe4-45b0-98c7-aa2a8d0bf2e2/romeo_and_juliet_storyline_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/cisco_press_ccie_routing_and_switching.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc4b01c-adf2-4eee-b54a-145850dfb092/2013_ap_bio_frq_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98d51e5b-2479-4be3-bbe3-0e5a17a279b7/falajo.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/39875087903.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_off0000f88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88E 5112 bytes
SHA-256: 5aefa0053fb7f603e627c282da919512571fda6e1d96e90dba2715029c8a24c6
font_01_sfnt_off000109f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F5 11136 bytes
SHA-256: b3fedf9b1cca7c1db6e16c6c4bdf7f7ec587ab428477fc45f0f0adf264154248

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