Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63d3a99cde14296…

MALICIOUS

PDF

73.1 KB Created: 2021-02-15 04:52:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f509ffca18144afcd9c6c1f786605567 SHA-1: 422cbd37619ab9d688a0288011a90cf7713ba4fe SHA-256: b63d3a99cde14296b238293344ed51ca7bf4f47442dc9b2f58b2bd8598aab569
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://jottigo.ru/wb?keyword=foam%20sheets%20for%20sale%20south%20africa PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366327/normal_601b11241d1b3.pdfIn PDF document text
    • https://ledobosu.weebly.com/uploads/1/3/1/3/131383424/joliwopinapufowuwura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480744/normal_6011b68415a50.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/142065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389355/normal_60152ac0a73a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480170/normal_5fede49d3253e.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/lufimemokokozur.pdfIn PDF document text
    • https://wavasifowimuzog.weebly.com/uploads/1/3/5/3/135321241/03613df658f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388173/normal_5ff5e88b05777.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420604/normal_5ff5315014fac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373504/normal_600a955944daa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486548/normal_6014f16a037e5.pdfIn PDF document text
    • https://nesurufaratetud.weebly.com/uploads/1/3/1/4/131408203/2767461.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379222/normal_60039418d9f33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459922/normal_5fce981d24db5.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/wurivuve/euchre_score_sheets_8_players.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/question_answer_of_fear_hseb.pdfIn PDF document text
    • https://s3.amazonaws.com/kafises/38819124302.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_off0000e0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D1 5076 bytes
SHA-256: c0e636f100039d952362900c4f6e1a6f79d38b651867042a312959bbf8cb1d32
font_01_sfnt_off0000f1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EE 10984 bytes
SHA-256: eba65e31d5166c5daa9fbbaa1c1dcc51da1c0b02481fcdba74ef8798e4c82628