Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d820258d6f7d3e…

MALICIOUS

PDF

70.6 KB Created: 2021-09-29 10:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0e153e77509a2ffb3d41bced0ebfa680 SHA-1: f061bdc75aa2523577b2085c2e7c487b00c0f476 SHA-256: 14d820258d6f7d3e653b7f75a2ac3d1ab638a83eec629a4cbaa45d3c6cbacb10
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains multiple embedded URIs, including one pointing directly to an IP address (104.156.58.56), which is a common tactic for phishing or malware delivery. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a malicious intent to obscure the true destination through numerous redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://luxcottage.ru/stroykamen/userfiles/file/zonikujodijolugawebivobe.pdf In PDF document text
    • http://studiotecnicolari.it/userfiles/files/bopuxaximadelarexape.pdfIn PDF document text
    • https://www.hkha.com.hk/ckfinder/userfiles/files/pagitipelirolade.pdfIn PDF document text
    • http://an-ocn.ru/ckfinder/userfiles/files/72663069635.pdfIn PDF document text
    • http://cameranichietsu.com/luutru/files/31192675964.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/92136432709.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/686763517.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/texos.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/54404478169.pdfIn PDF document text
    • http://marktoby.com/akram/know_news/admin/userfiles/file/vobupunapobol.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/27261566771.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16141e0f727939---satepefixol.pdfPDF link annotation
    • https://cpsguffanti.com/uploads/file/22280960466.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/kerexadaxewugiluxew.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/29451965993.pdfIn PDF document text
    • https://quangcaowebsite.xemlaco.com/uploads/files/34532419077.pdfIn PDF document text
    • https://acerocorte.centralcms.cloud/galeria/files/widavemagiwab.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/43469257298.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/83362055178.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/71183831833.pdfIn PDF document text
    • http://www.tiendadelbordado.com/ckfinder/userfiles/files/gibufavakogoruro.pdfIn PDF document text
    • http://gpkoaee.ru/ckfinder/userfiles/files/fidutuwozozo.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/2ru1cgrl14ef2n2tdkii1e6s51/nijiduvepipasuwaxonifudo.pdfIn PDF document text
    • http://rc-modeller.se/images/file///46093076136.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=android+create+webviewPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b35a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB35A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6C 16356 bytes
SHA-256: a6205c2dc3e9f5a43f4cfdfb9c9c78c6074ef3a6e21dcce3533915717f36b01c
font_02_sfnt_off0000f509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF509 10420 bytes
SHA-256: 50134ae53500f3b11422a2c76d5036eb834317ad7410963c7b4d129c3a2bac13