Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8918a897cdc8de7…

MALICIOUS

PDF

72.1 KB Created: 2021-02-25 13:12:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7737cacc6f11fb263d06097f1e447559 SHA-1: faa72015dd8cd9c56befb472c29b11d1b699af90 SHA-256: f8918a897cdc8de7457989e6dadbf96716972c3d8ffe8940dea812f20ab920d7
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://jacksth.ru/award?keyword=what+can+i+use+to+treat+a+boil PDF link annotation
    • https://koreperuk.weebly.com/uploads/1/3/2/6/132680900/13a58c.pdfIn PDF document text
    • http://kozaredibedemok.iblogger.org/dj_arafat_jonathan_video.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/32056520172.pdfIn PDF document text
    • https://rusijarumeza.weebly.com/uploads/1/3/1/8/131871651/kesurotokogan.pdfIn PDF document text
    • https://sivisobimiji.weebly.com/uploads/1/3/4/7/134754783/a754298.pdfIn PDF document text
    • https://padawevuwelidas.weebly.com/uploads/1/3/1/4/131438111/19c34c7828.pdfIn PDF document text
    • http://renakuw.iblogger.org/breville_the_smart_oven_convection_toaster_oven_reviews.pdfIn PDF document text
    • https://kuwujevo.weebly.com/uploads/1/3/4/8/134864034/6f292cb430d2d4.pdfIn PDF document text
    • https://vawosikajoj.weebly.com/uploads/1/3/1/4/131438279/2968065.pdfIn PDF document text
    • https://wuxinuwizon.weebly.com/uploads/1/3/0/7/130776673/wobotizolixok_jabafujapepuk_tudazidadodile_dajuxulupagigi.pdfIn PDF document text
    • https://losebevaxefot.weebly.com/uploads/1/3/5/3/135347065/juxura.pdfIn PDF document text
    • https://zesasanigemi.weebly.com/uploads/1/3/4/6/134646319/padafomebozamubabaz.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/zazelujeju/clerks_award_pay_guide_2016.pdfIn PDF document text
    • http://gafibis.epizy.com/jaxabizewoti.pdfIn PDF document text
    • http://wopolew.rf.gd/xexobilagipugisifubigu.pdfIn PDF document text
    • http://bosewavim.rf.gd/line_mo_bisects_angle_lmn.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/sizabipim.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/anemia_in_pregnancy_nice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/dashboard_reports_in_excel.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_off0000e061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE061 5040 bytes
SHA-256: 72fde650000be29da2cb1bed912d714427aa33da06b7e67558c64f89471abf89
font_01_sfnt_off0000f18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18A 9932 bytes
SHA-256: 0badb063f07a58f99be3520b891e70d35accae1a269a1dda5eb948058be3f1c1