Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d974b7e55ae5dca…

MALICIOUS

PDF

71.8 KB Created: 2021-02-22 11:40:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 09406547de20e5a4fb6b96f5b83e8ab6 SHA-1: 984bf20820d219c2ca78279fae53ff9216134de3 SHA-256: 4d974b7e55ae5dcacf83f47fc5ffc8dca546f09ff214811460bd62afe6a8b1b2
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wb?keyword=making%20a%20good%20script%20great%203rd%20edition%20pdf PDF link annotation
    • http://rmk4sale.xyz/sajidomejakupavaw77le.pdfIn PDF document text
    • https://tovibimatajo.weebly.com/uploads/1/3/5/9/135963052/e75a2134a4ec17.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/11852310560prrwy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418180/normal_5fd24285474f2.pdfIn PDF document text
    • https://cdn.sqhk.co/latosagax/ibm5WSU/skyward_bisd_login_burleson.pdfIn PDF document text
    • https://cdn.sqhk.co/vuveleni/d2l5XHc/buxixamogefamamikex.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/lhjjegc/idle_heroes_star_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/Wc2Skgh/60365469932.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/ghhjdCd/30405376563.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/idhcHjc/safud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420224/normal_600eca28bbf46.pdfIn PDF document text
    • https://befadileniralan.weebly.com/uploads/1/3/6/0/136082268/senasimujime-depofutugoduv.pdfIn PDF document text
    • http://visiblawty.com/vubitudisegarufo3rqg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408352/normal_6032115786dd8.pdfIn PDF document text
    • https://domexuvuk.weebly.com/uploads/1/3/0/7/130740212/gisumemexumo.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_off0000db68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB68 5524 bytes
SHA-256: 79a2dd0d7f466540f1de219a52af4e131e0beeca9a12bad3ee389931dbb0b281
font_01_sfnt_off0000ee56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE56 10596 bytes
SHA-256: 550fa1cd1a667003f33f3445175ba43c12b686cfb4a5c3608ce6150e65385381