Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddaab3140b469636…

MALICIOUS

PDF

97.7 KB Created: 2021-07-02 19:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 224ff158735ddd6887e427fcae066d40 SHA-1: a44b987067f1e5d70ac1c027ab9843e71aaf56b4 SHA-256: ddaab3140b4696364198e13881eb6b11b027cedab40ae64acfd67376f71274b1
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites, likely serving as a distribution point for further malicious payloads. The presence of multiple links to disposable hosting and the use of 'utm_term' parameters suggest an attempt to obscure the true destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1aedcc071---seroridalemur.pdf In PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/dd2b59e6ddc5d9ffb892c21740487492/89453640360.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210623_E2DDDE683A14CD0B.pdfIn PDF document text
    • https://rasorestefano.it/file/7261018449.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/76253185912.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/aqhv7n2jmdkllkghm4n7sgf184/mabivuvituwejojof.pdfIn PDF document text
    • http://hongdanhaudio.com/luutru/files/vogitexawoxuzubojo.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/22742697105.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/6cafb27b5274c6b6e609f26330c58512/jewuxidemijuludubajek.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/a89d8503057967be64b5f4fcf382421f/38973005817.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b72e53de9---80684903586.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/19040396584.pdfIn PDF document text
    • http://alltechsro.cz/files/komubuziloratubuwerelop.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/adaed3ed25941486f13939f7e650cf37/bolaga.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c265bbf20f5---43291611653.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609722b4e8be6---vidukoripadosizobozajazid.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/berogipefewavi.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099c5d38fb1a---wixafowazipapokedizoj.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609322dc99d6e---sewazoji.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e009f3bed---tiwezokisiwaxefasotuweja.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d33838dff6---30424676416.pdfIn PDF document text
    • http://aps-mes.com/files/file/kidileduwilozobamuxafite.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/pgr5spk6mdpim07u9nfa0j5s5u/xojepunoxovotezobodif.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093f40f30f87---18729768320.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609efb9a528a9---dazupemi.pdfIn PDF document text
    • http://etd.cput.ac.za/handle/20.500In PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=consumer+buying+behaviour+in+hotel+industry+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_off000119b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B3 17268 bytes
SHA-256: 48da147a120da493190712699cea5e9c24d5f5b91168b5f1719f50d0a76dbbf6
font_01_sfnt_off000146d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146D5 11396 bytes
SHA-256: 8fb5b2d05f929b430e11dc18c33a1c3e8f80a889ebbd7b7ca0c3302414d39a82
font_02_sfnt_off0001612a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1612A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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