Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a0d689b058185b8…

MALICIOUS

PDF

87.8 KB Created: 2021-06-26 13:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b335e6f4c2a14365836b86e33f96e316 SHA-1: 6708e312a94af149a568d58c35fe881c61a12d81 SHA-256: 5a0d689b058185b890cea869779966176f6f6b388d541945835533fe753b01e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised CMS uploads or disposable domains. This behavior is indicative of a link farm designed to distribute phishing content or malware. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://coretry.ru/uplcv?utm_term=essential+commodities+amendment+act+2020
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/gogutodirukojawuv.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/616bef9c7d86842200108fae6e933769/xatewokesomuforide.pdf
    • https://protradingindia.net/userfiles/file/35044709282.pdf
    • http://bestorkate.com/uploads/ckeditor/files/81454130210.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/luda50v9ic03c2qgdlqf83j7n1/wavodotelodudode.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/15c21ca7c5ce57077a0ad1a83f4bcc42/24677370465.pdf
    • http://3suntech.com/UploadFile/file/20210618115347176.pdf
    • https://alatheir.com/atheirwsfiles/file/zigekosuwixupuwagipomuj.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/5uvoj0kmbui1umudeqgs01osna/73926158956.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075941f52795---42525870666.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608920a8e447d---98246132155.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4848391d4---14115203230.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/da4b7b686c29883601199ef9ded05512/21443018999.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16089b007f3559---kobuponelazijumu.pdf
    • https://eyetracking.pl/userfiles/file/60700618512.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d571bd6ccbb---gotagusedelatosorosewet.pdf
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/5d75770248ee90e82f6bed5dd7a9e2e4/jomozu.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/p4o1r6fbgr2cjtglkp5qn2jec1/41969182271.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/6e3a30135b527f6dc5996741cbea4f5f/visumobavikevabulut.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/c44d9562677de7f3443e46ab2c4eca2e/nurilefitajo.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/te67hdfrsnka1f2i2psls2uqs3/34912614279.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a29cca3905f---ruxawig.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/b892120516b126a0c959dd2bab6ae8a2/lakivojejojes.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1d562ca39---52617201919.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae793ad8fe5.pdf
    • https://progin.swiss/ckfinder/userfiles/files/pegox.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/a6d1ca41357ac1632a2f853360035ffe/43166271546.pdf
    • https://annjulieskarpmo.com/userfiles/file/59638924329.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_off0000f586.bin
c800c985f5a03f8bd983a2f3407eb585d3f41ccfbe2a894a0d8fa6a210e0e12c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF586 16712 bytes
font_01_sfnt_off00012102.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12102 16792 bytes
font_02_sfnt_off00013919.bin
e089fbe4acc44c194971600934fcfae990b488101ccb50af100fe6fd5f935920		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13919 10656 bytes

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