Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a12525103548e1…

MALICIOUS

PDF

90.3 KB Created: 2021-07-03 23:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: eac0a7636dded72f1b9cd3c00dd86101 SHA-1: cb8e322bdd5403586b4779dccb116860a203c274 SHA-256: 06a12525103548e132e98721924706e61759863bfa55c8c425bc8783dbf2a62b
196 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains numerous links to external websites, many of which appear to be hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The presence of 'cmdankcgpvbvdq/jakemej.pdf' and a related URL in the document text indicates an attempt to execute commands or direct the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://namjapizza.com/app/webroot/files/belifu.pdf In PDF document text
    • http://coreaad.com/DreamDataUpload/file/nobugojuraxagizaxebukema.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/69257081253.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0b6a05023---77576568067.pdfIn PDF document text
    • http://myredm.ru/uploads/file/wunojafat.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8695fd5f98---gidisomizitixafifi.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/tibepurukagazogasenezi.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/e6f1f207908srhob43he7ngm01/82274925031.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085a687a10d5---97529022745.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/xokokoxoviribizotip.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077458d02ae1---51713334011.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/fbocpa2kio9aoqhdr3esm67asv/56404352293.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/fec7fac536858be1910f8b42f9d54b7d/vozonidupi.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/3b0hiqb85vcrcmdankcgpvbvdq/jakemej.pdfIn PDF document text
    • http://thelewisfamilyreunion.com/clients/c/ce/ce72a6ed4f7059d305e3bbfb121cee90/File/wuwaruwo.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/1d5778481614ec0f3a43a044c352889d/dadiwosikoluzopava.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/eb55d74503d78a784ef824ddd40b3e75/rowurozubujedekonata.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4eb0d91c2---78026585466.pdfIn PDF document text
    • http://altinay-law.com/images/file/17669006030.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d660f78c435---15766127833.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/tobimenozajowarikujige.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/72777963230.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/86155720005.pdfIn PDF document text
    • http://intergeored.com/upload/File/gunezebilomepotamuwatow.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/visufapusepinif.pdfIn PDF document text
    • http://thelewisfamilyreunion.com/In macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=spiders+that+like+waterPDF 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_off0000fdb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB5 10516 bytes
SHA-256: 020af2f3bbe2fd6b354ed36c3fda836359441a7c491a44511ef82c44cae7217c
font_01_sfnt_off000115d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D0 17444 bytes
SHA-256: 8cf5eaf185489401a468f521d1c8bc448a87ead4c9873325a38e4b46a63e8738
font_02_sfnt_off0001438d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1438D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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