Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0df54742049818…

MALICIOUS

PDF

95.9 KB Created: 2021-07-05 15:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1fe944e327e8c68da07096c9ad7330dd SHA-1: d3b65ad40bc56fa0f795b2f6d51da4792eeed286 SHA-256: 2c0df547420498186c4ae06ba40e9039ecf1665c6e2c3b4234bd1d5816cfe37a
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as a link farm, with many distinct hosts and a high ML classifier score. The presence of numerous URLs, many pointing to compromised CMS upload directories or disposable hosting, indicates an attempt to redirect users to malicious content. The ClamAV detection further supports its malicious nature, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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 http://glotecgh.com/upload/editor/file/45715446375.pdf In PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2f1a71dc4---tojopijepowe.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/35232168398.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/60hm2jm4p1t10u2eep8epvop6p/57090790179.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/2v24geff8aod01c26od1l0mmov/rurujodovizesojutixawivi.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb282389ab---lidonafawukatot.pdfIn PDF document text
    • https://loctra.net/userfiles/file/57740447784.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16075afa8b2f28---levarufonugodomav.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2af2db3d53---53452782476.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/6198b8bc88ad0e94690b126ff9fbb768/visuxusufafilerovetixusog.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/83821134361.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/875114059.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/2162922365.pdfIn PDF document text
    • http://desagresbrts.com/clients/34568/File/rewemefipog.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4dc5154cf---58213883456.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/womebudojikuzirebanin.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/28406160583.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/0b4fd134d5d8e0641d94f1b51e4e5df2/zekigosinovuza.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160730d237d9aa---14382890988.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/pmimr4cpeoo8goviabj8sg1kt0/mevelovuxevezefuwajusu.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/pizuxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=high+blood+pressure+and+erectionsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE12 11024 bytes
SHA-256: 3b69c7d8b4952c690aec4dc4ee64509218b66d795403922b6a64de0990c29dbb
font_01_sfnt_off00011723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11723 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_02_sfnt_off00012c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C95 17596 bytes
SHA-256: 1a4619fa90e69cee77c25ecf9f9305b5c5cfc421c170be9bf36ba6c0034e2349
font_03_sfnt_off00015a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1