Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea16f7709366c865…

MALICIOUS

PDF

84.9 KB Created: 2021-03-22 12:18:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 86b5dccc6f67de6fa68b5f96c8474b5b SHA-1: 22a610eeef6a45ea9e8dae6b62b26d02dab3a84e SHA-256: ea16f7709366c865edb21d4568cb69831dc560ce97686b7e900fbc40be67f251
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or malware distribution. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a high likelihood of malicious intent, as the document appears to be a link farm designed to attract traffic. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/award?keyword=carpincheros+augusto+roa+bastos+pdf PDF link annotation
    • http://gipogup.sportsontheweb.net/tamulugeguseguzorid.pdfIn PDF document text
    • http://konolux.medianewsonline.com/94574579409.pdfIn PDF document text
    • https://rominekajamarol.weebly.com/uploads/1/3/4/0/134040464/6900547.pdfIn PDF document text
    • http://pozuvixa.getenjoyment.net/zabivevetuw.pdfIn PDF document text
    • http://rusewigojubilon.mygamesonline.org/alendronate_davis.pdfIn PDF document text
    • https://retumitoratosu.weebly.com/uploads/1/3/4/2/134234586/2996599.pdfIn PDF document text
    • https://cdn.sqhk.co/duwenaxiseve/f7ggzih/48150689403.pdfIn PDF document text
    • https://womominajarizu.weebly.com/uploads/1/3/5/3/135392323/fafdc603f1f895d.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/anger_management_modules.pdfIn PDF document text
    • http://lowufadit.scienceontheweb.net/90442283292.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/Jgg9iil/sceptre_tv_remote_codes_comcast.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/26004936474.pdfIn PDF document text
    • https://cdn.sqhk.co/zakolemafemo/geKjdTS/42938994037.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/sifetupomizujanezoxokojex.pdfIn PDF document text
    • http://dipazekonowa.mypressonline.com/sahih_bukhari_malayalam.pdfIn PDF document text
    • http://diporesorojina.scienceontheweb.net/19604937104.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/ii6Lxjc/ntrca_e_applicant_copy.pdfIn PDF document text
    • https://febujularezot.weebly.com/uploads/1/3/0/8/130813651/1abe446d49bfc50.pdfIn PDF document text
    • https://maverutorolo.weebly.com/uploads/1/3/5/3/135393183/889638.pdfIn PDF document text
    • http://nituzovido.getenjoyment.net/agriculture_books_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/duzixulok/fgfgfVT/96371363733.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fadezanunadafik.myartsonline.com/graphic_novel_definition_literature.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/philips_norelco_bodygroom_series_7000_canada.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/59856538679.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_off00010c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2F 5428 bytes
SHA-256: 75224bee9038a46c8189c3ef7e2906570a31d2e187ff03f1de084495341b2537
font_01_sfnt_off00011e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E93 11852 bytes
SHA-256: 4d8c0708bc416d3c843e2484586a4653e3c8e908a8a9dd4a0f6ffab45e39c45f

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