Malicious PDF — malware analysis report

Static analysis result for SHA-256 db1962199808b128…

MALICIOUS

PDF

84.1 KB Created: 2021-09-03 03:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 68590edd4577a2fd5b03c89963290105 SHA-1: ce4435f278f336f77242e469807ffa4e299a9ac5 SHA-256: db1962199808b128518db4ea76d0c2f94b90e47e88bde7a08dd87610bf4a661a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress upload storage or disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/522f815d394ff6ab6b6a197f33a5ae9f/besajobebonigixazivizorop.pdf In PDF document text
    • http://monkey-do.net/userfiles/file/julejotazumibizabakazumok.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6742016e2---kadifawujegupuk.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/midujuzaseniburirolelubav.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210518105354.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16088bca14479e---46034299029.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609845c8e9baa---89095703423.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a53667952---90168351135.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/897f7f8374f186a3f698f99a72743035/13444556363.pdfIn PDF document text
    • http://onlinetalk.jp/app/webroot/img/fckfiles/file/jezawefilozekalom.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c1891d60abd---19850616787.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609de1b401ad5---78608152926.pdfIn PDF document text
    • http://olympiad-bigben.ru/ckfinder/userfiles/files/83294151660.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aac1ce2dbb1---tibozilazewitekapazave.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/07/file/202107170858118660.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/modikogamafutotokilub.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/pokide.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/79827527036.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e80f4e70e---ruwerejekaniniwevuxe.pdfIn PDF document text
    • https://bocrangsuthammy.vn/upload/files/nadepa.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bd95ca465---53200737829.pdfIn PDF document text
    • https://go2germany.ru/files/file/dumavolum.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/e4d3c67726e7829c579558430e6a35ab/welur.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84719deeed---77160835390.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/53567699350.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=talleres+de+autoestima+en+adolescentes+pdfPDF 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_off0000e335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE335 17708 bytes
SHA-256: b1a95e0bb02b5a108960b829ea451fc3a40363f898ba813df7cd64821249e786
font_01_sfnt_off00010faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C6 10844 bytes
SHA-256: e740af5c405a96969fa29bbe8e8f2e1785f2a61960908d4eba5c8bf0c483a99b