Malicious PDF — malware analysis report

Static analysis result for SHA-256 79fc28cd28be751e…

MALICIOUS

PDF

67.9 KB Created: 2021-03-03 22:37:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 752e0b490102bab4c0e37c5ad2ac4550 SHA-1: 2d3db6c0b9ccfaff31043e5e81c1742f10233392 SHA-256: 79fc28cd28be751e5ef6516c66986f13e6e2e80b698e090565c3efd712c8e88b
126 Risk Score

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 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://vilenefex.ru/wix?keyword=amscope+microscope+instructions PDF link annotation
    • http://ctuxuu.com/54721974771nnw1w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420244/normal_5fdfd8298f53f.pdfIn PDF document text
    • http://detonic-ro.website/77556093923lh9to.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/dThaegf/pokemon_tcg_sword_and_shield_rare_cards.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376382/normal_6012a39ad8041.pdfIn PDF document text
    • http://uscreditreport.info/73042773384jnqk2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_602503480fc3a.pdfIn PDF document text
    • https://terunutu.weebly.com/uploads/1/3/5/3/135319236/vuwogemevut.pdfIn PDF document text
    • http://limecash.xyz/fakamigarap8x0mu.pdfIn PDF document text
    • https://zonixaroponovan.weebly.com/uploads/1/3/1/3/131398400/2c03250478.pdfIn PDF document text
    • http://prizinsta.online/subway_franchise_agreementp5zy2.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/cia5XEA/bezazojipofatorin.pdfIn PDF document text
    • http://wide-do.top/kusiganexalutoxoxog2fz0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454999/normal_5fe4ff9e50fb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527042/normal_601f290696362.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499002/normal_5fcbf08c4ab0e.pdfIn PDF document text
    • https://cdn.sqhk.co/pamezuravuno/cjfibjf/75560003477.pdfIn PDF document text
    • https://memonimip.weebly.com/uploads/1/3/5/3/135349780/6216740.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ce01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE01 4824 bytes
SHA-256: e12215544828fa108adc38e93abdfcdf34ef2109225fdc6bc3826a762f39b404
font_01_sfnt_off0000de5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5C 10604 bytes
SHA-256: 7fef1d329e068fd76358cc48c48a5411a488e2966c3b541e6247f521a901ed31