Malicious PDF — malware analysis report

Static analysis result for SHA-256 86296530245da9de…

MALICIOUS

PDF

74.5 KB Created: 2021-02-26 23:25:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 163ba59fa7419a49022d202c060c2da5 SHA-1: 91cf0b990bc1853381ddfa21142dff13b6b1beab SHA-256: 86296530245da9dec771599482710727187945c436b7eb661b92a76035aaa32f
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that lead to suspicious domains, identified as a link farm on disposable hosting. The document body, though heavily obfuscated, contains text related to the lure 'where can i get my kitten spayed for free'. The presence of external URIs and the ML classifier's high confidence score indicate a malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=where+can+i+get+my+kitten+spayed+for+free PDF link annotation
    • http://ferobuxanax.iblogger.org/32407587241.pdfIn PDF document text
    • https://mokugutareno.weebly.com/uploads/1/3/1/6/131606089/xelowatapujalamejawi.pdfIn PDF document text
    • https://wuvozova.weebly.com/uploads/1/3/4/5/134500004/ledanujumoresutudapu.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/48256467387.pdfIn PDF document text
    • https://gugamuwapubadek.weebly.com/uploads/1/3/0/7/130740318/juresegow.pdfIn PDF document text
    • http://texuxetikarobu.iblogger.org/software_test_engineer_salary_california.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407562/normal_601876cdeaf6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5fd6c24b113c3.pdfIn PDF document text
    • https://gawofatofuwe.weebly.com/uploads/1/3/1/3/131380275/petibit_kuresakogagowo.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/88619801727.pdfIn PDF document text
    • https://gigotuvo.weebly.com/uploads/1/3/1/1/131164366/vuvaxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujuvisesakok.myartsonline.com/amar_chitra_katha_mahabharata.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/kebufelakivirixifurijuxa.pdfIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/12283189276.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/37419304211.pdfIn PDF document text
    • http://tikarere.epizy.com/frictional_force_experiment_lab_report.pdfIn PDF document text
    • http://xixakoju.rf.gd/cashew_nut_health_benefits.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_off0000e3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F6 5716 bytes
SHA-256: 2bab318129632721b5cbb165f90e53486b0763cad45776462c3419318bcf9756
font_01_sfnt_off0000f75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75B 10876 bytes
SHA-256: 242acffab79f99b10c2e67c0c6242a6f4f12676116634073f25adf451b3b6f42

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