Malicious PDF — malware analysis report

Static analysis result for SHA-256 df0f5f7ed5c7290c…

MALICIOUS

PDF

70.7 KB Created: 2021-09-18 11:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d813e19cfa4bdd022cae65b329d3dcbd SHA-1: 6e84c7b067eebf32444d1b86bec8b4bc9733066b SHA-256: df0f5f7ed5c7290c337f81024aea7eed61363a10418594c48edbec856f48d573
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to external resources, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://huntic.ru/uplcv?utm_term=dragon+ball+super+game+download+for+android+psp PDF link annotation
    • https://opsclown.it/ckfinder/userfiles/files/34685280428.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/2f7e50593fd1c22d73472fece6730765/panitemugozafugu.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/nikikiwamaw.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/20228221744.pdfIn PDF document text
    • http://isemya.by/modules/ariol/static/ariol/ckfinder/files/xademuruwolowabuzomu.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140dbb9c4d4a---nemikotonunaxazugat.pdfIn PDF document text
    • http://metalzilemboeventi.com/userfiles/files/9250071118.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/89146128600.pdfIn PDF document text
    • http://uekekb.ru/!upload/files/rovojuf.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/gejazelazojudig.pdfIn PDF document text
    • https://jasmijnbloemengroen.nl/userfiles/file/31613002914.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613db155a2f3b---motizuboz.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/161336bdbcaa41---69850080048.pdfIn PDF document text
    • http://sccsfz.org/upload/2021-09/jesolitabivifubisumizatu.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/69274907762.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/guxunaporaramopubapajoken.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/29563772754.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/22477987992.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/66139437257.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/68815841793.pdfIn PDF document text
    • https://spcinternational.in/ckfinder/userfiles/files/31356877911.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613faa3422cc1---gojudogikoso.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613735efa89e5---bulum.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8bf9cd612---sobazomipa.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/90170255879.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_off0000b61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB61A 14976 bytes
SHA-256: c3faa3f5ac406dc7896126d924945fa382fc34095080ca4c55e59eea6be0c176
font_01_sfnt_off0000dbfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF411 11068 bytes
SHA-256: cd74f8cf12c4ea32703ef1f219c5fdf7055461884579c4fc0995d6c45d5d16a2

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