Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe430a7caefe5ec…

MALICIOUS

PDF

87.2 KB Created: 2021-07-23 09:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 97a5d2f2e267bfe817e10e4f48ba059b SHA-1: d1ea7e297461f1b7b6f3183fcc89bfbee545815e SHA-256: dbe430a7caefe5ec2a43c478ffd4b3f760085103c361497e953ba83e45b33197
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites, some of which are hosted on disposable domains or use SEO manipulation tactics. The primary purpose appears to be directing users to external, untrusted resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/eel2a4uisevgioi879m5bcjopt/zunexokemuresagunila.pdf
    • https://aawyx.com/sites/default/imageuser/file/zagatas.pdf
    • https://kildevangen.dk/files/dutodewi.pdf
    • http://www.asap-recruitment.net/upload/file/zexujo.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9d189981f---lofepenosinogimifogex.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16081dbc6d3019---pejalu.pdf
    • https://marljivo.hr/userfiles/file/sabur.pdf
    • http://wjvanderheidedienstverlening.nl/uploads/file/kupomalopupepo.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/55f8287b718c434b6b1149e916f4ecf8/53472840094.pdf
    • http://stphilomenaonline.org/userfiles/file/butidoxetatevamefapu.pdf
    • http://akcjonariusz.com/UserFiles/file/xozufinodosanuzo.pdf
    • http://lagrupacio.cat/file/nunapatiduve.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/84u7pnl79nna7f6govc1h89k22/99538862520.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160906a9051c75---51067831672.pdf
    • http://aydinservis.com/ckfinder/userfiles/files/30940736198.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/7uad3l092h50ivlutp0qc3aq7a/wifavilalevosasofi.pdf
    • http://purofirstli.com/userfiles/files/65371364391.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdc4d799f6---sowitemixagalukevimebigin.pdf
    • http://ahchala.com/img/file/63564911446.pdf
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/rabawubutonebut.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abca1fe0309---5670824223.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f9977d052---xuvobelifasidigej.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=the+doctor+and+the+soul+from+psychotherapy+to+logotherapy+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0dd.bin
43baef66d809d9dc5b07d900e4f5ae3026523ad192515b2b0f1e4a4b62f406e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DD 16812 bytes
font_01_sfnt_off00011c71.bin
aa992683ce298d0a3ffcacfe38d8ed47e2adc6aee4af308677e55cec2b1744d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C71 11152 bytes
font_02_sfnt_off0001362a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1362A 16792 bytes