Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd59b451e622f90…

MALICIOUS

PDF

78.3 KB Created: 2021-02-01 09:29:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9de72404b181c14bf9d1a0bd5ac34eef SHA-1: 2c7cea632e2fdf5e6b6585bff069fd41bc360b10 SHA-256: 9bd59b451e622f908ee004adaccfbc449088776362673cd1afb1d0ad15c5b04c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious content. The presence of 'Fennies beckenham ofsted report' in the document body suggests a lure to trick users into believing the document is legitimate, likely leading them to download a second-stage payload from one of the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/aws?utm_term=fennies+beckenham+ofsted+report PDF link annotation
    • http://wegutamozeji.iblogger.org/vonubaseredajog.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/hceicgf/14537072980.pdfIn PDF document text
    • https://nemelodanunoju.weebly.com/uploads/1/3/0/8/130874480/fitamekoziwexozisi.pdfIn PDF document text
    • http://bavedibigilomit.66ghz.com/20496567179.pdfIn PDF document text
    • https://gitufigekuxos.weebly.com/uploads/1/3/4/6/134634758/dexibal.pdfIn PDF document text
    • https://rakonudiboxenej.weebly.com/uploads/1/3/4/8/134874851/9974074.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/dShcr7c/idle_island_city_building_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/hd4lhjD/62183720596.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/DihKNXV/84622407049.pdfIn PDF document text
    • http://vagijuderotogur.22web.org/animal_crossing_hairstyle_guide_new_leaf.pdfIn PDF document text
    • http://negeduji.66ghz.com/corrosion_experiment_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuxigukupem.epizy.com/jafuwapek.pdfIn PDF document text
    • http://dutagewenurodub.epizy.com/tugizifoni.pdfIn PDF document text
    • http://legekiwogitevil.epizy.com/gujikakuganinerawatavem.pdfIn PDF document text
    • http://ruvaseravijuged.rf.gd/pegibesabunob.pdfIn PDF document text
    • http://rejufamux.epizy.com/52662001493.pdfIn PDF document text
    • http://zufagubiles.epizy.com/panofegezazijakalanufazen.pdfIn PDF document text
    • http://borarujedumamut.epizy.com/81329141642.pdfIn PDF document text
    • http://lobidirubegevil.epizy.com/bu_jhansi_examination_form_2015-_16.pdfIn PDF document text
    • http://zekubegem.epizy.com/gagesifukowadoxi.pdfIn PDF document text
    • http://wuvuwipiwizovid.epizy.com/88455518355.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF444 5520 bytes
SHA-256: 32c3a5bf4765b2458e576b3e169e263caafef4f600f7d60b8045ef112dd58ec9
font_01_sfnt_off000106df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DF 10776 bytes
SHA-256: b9f6f440a80581e2692cdc8fc1a74df442071c733745b5b023650609221fcbc9

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