Malicious PDF — malware analysis report

Static analysis result for SHA-256 f84fa50be2252bf4…

MALICIOUS

PDF

77.4 KB Created: 2021-09-26 22:35:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ac3400cbc952a6a1f6b5bc3296552db6 SHA-1: 3b95345cf45cf2ac691b3d291fcec157fc338506 SHA-256: f84fa50be2252bf4ecc17565ac40d4614568269b9e0da0f44b1c4223afda56cd
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URIs pointing to external websites, indicating a phishing or malware distribution attempt. The presence of a link farm on disposable hosting further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://smidgel.ru/uplcv?utm_term=baixar+root+para+galaxy+y PDF link annotation
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/0346c788f1145abb1948336e0c638bbb/69540532248.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/keturitabeko.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/60904617044.pdfIn PDF document text
    • http://www.klccpa.com/userfiles/file/In PDF document text
    • http://gzafjc.com/uploadfile/files/joturulobepanafofita.pdfIn PDF document text
    • http://elsped.hu/files/file/luzabinedejivodem.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/fizuvenawofogewejutot.pdfIn PDF document text
    • http://cesarrodarte.com/userfiles/file/25606257088.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/ravevikovevodonagemimoz.pdfPDF link annotation
    • http://janjoling.com/public/ckfinder/userfiles/files/43911202995.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/73976114951.pdfIn PDF document text
    • https://supermovi.com/userfiles/files/57247318981.pdfIn PDF document text
    • https://capital-publishing.com/ckfinder/userfiles/files/mumeruxiludetudekumidepug.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/86758022828.pdfIn PDF document text
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/90393631574.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161442b8f7a070---tegepopenagixiz.pdfIn PDF document text
    • http://gjbbang.com/userData/board/file/fixoneke.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/nesalufozadame.pdfIn PDF document text
    • http://cosonhuath.com/hinhanh_fckeditor/file/gipanogujoxakezinavewus.pdfIn PDF document text
    • https://mimpisiluman.com/contents/files/wikakukonusadinipinow.pdfIn PDF document text
    • https://rakbah.healthybitespk.com/alpha/ckfinder/userfiles/files/wadakofolamawodid.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://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_off0000bfea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFEA 21356 bytes
SHA-256: c48782b18e9010fe239321fb136226b8a52a3688e2efceebb0fd42f4b5a069b5
font_01_sfnt_off0000f741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF741 10292 bytes
SHA-256: 0716caeebe27080a760cf32a979bab096e0488ade66d8f1068aa76ea05008e2a
font_02_sfnt_off00010e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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