Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9398147d678b247…

MALICIOUS

PDF

73.1 KB Created: 2021-02-22 09:10:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f24c198a135c5ce4928261a7d8b07b36 SHA-1: 4b0b360cd8884fe9d6bafc05ede660b98f3ec45b SHA-256: c9398147d678b2470d91c17f1b9aec3e217963bd4d342215c2401b30d68316a6
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 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.
  • 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/wb?keyword=baby%20girl%20names%202021%20uk In PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/kunuderuzakitaloren.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481667/normal_602e7b48bcf22.pdfIn PDF document text
    • https://cdn.sqhk.co/wafavalufa/cghCNjg/automatic_dog_ball_thrower_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/girasufu/ekhfihG/zesaberikewi.pdfIn PDF document text
    • http://ragukir.iblogger.org/gubedisujijabed.pdfIn PDF document text
    • https://warujupegam.weebly.com/uploads/1/3/4/6/134687544/9656619.pdfIn PDF document text
    • http://dirugalaw.22web.org/php_html_data_json.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459185/normal_5feb90f84e6b9.pdfIn PDF document text
    • http://javebamugizal.66ghz.com/bed_sheets_on_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/ej8Nwyb/95484839655.pdfIn PDF document text
    • https://cdn.sqhk.co/xokekekav/hXlIji7/gutaforejolidubezunozo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pebujenutifovo.rf.gd/sylvias_playhouse_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/videg.pdfIn PDF document text
    • http://modedavap.epizy.com/cervicalgia_aguda.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/gafisazinenigufukera.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_off0000df02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF02 5688 bytes
SHA-256: 0a1d3e6806d321d33e1a419dc37008777038b4cd98da24772bfbc1ec9ff98ff5
font_01_sfnt_off0000f25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25E 11052 bytes
SHA-256: ea5844c8eebe3bdf3af21491db73b71359c5384c2a534e316b94b576c7bc9553