Malicious PDF — malware analysis report

Static analysis result for SHA-256 6012df9c783c2a38…

MALICIOUS

PDF

84.1 KB Created: 2021-06-30 04:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: ec61549430e629ebea408c221358d3ac SHA-1: e46957fa2342a0a9ab20900b1542aa158232acb2 SHA-256: 6012df9c783c2a38947e721814e4a8b8cda6261b4cc942a1ed1d209446a50fe2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. This structure is indicative of a link farm, often used to distribute phishing content or malware. The ClamAV detection and ML classifier further support its malicious nature, suggesting it's a phishing or trojan variant.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://queure.ru/uplcv?utm_term=miracle+flash+tool+download PDF link annotation
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/3erpi1fn6nh54kqndcfqoac47a/xapok.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/kimetutomapesinezumabe.pdfIn PDF document text
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/75033371602.pdfIn PDF document text
    • http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/salumujoropitibufamiwonu.pdfIn PDF document text
    • https://menu2uplus.com/images/file/labuwiroz.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/792e0737af3db8f958d5bece787556c0/nunamoperasa.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/2af5cee47ff2a7cc8ce8c2344bf98568/90505438651.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/3803199330.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16082ae89cea48---92199211917.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/90681273427.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/silusoketupasejutevogataz.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b8538dc23d5---13431530165.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/tibobeligawa.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/tavovegipuzemosave.pdfIn PDF document text
    • http://stevis.cz/files/file/vutazelajizosokibiwejomi.pdfIn PDF document text
    • http://hubbardfamilycircle.com/clients/62940/File/90671298520.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/divuwobedeba.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/kuwodukobupopidaw.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/11671066139.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16085780043d64---53878929718.pdfIn PDF document text
    • http://allycatering.com/userfiles/piriwukonefirasatofal.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160bede5d945cd---85738229241.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83eee846b4---tagawekesokizipovogut.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/df7748e2a10c29392f198bacfc7c2303/13601152073.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/vumoxotobolexuvi.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50D 10652 bytes
SHA-256: 3310e5e9c83694da16d640b400874fc76195a2fa16f67c49fa0aab0009da6588
font_01_sfnt_off0000fd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001158e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158E 17444 bytes
SHA-256: 6b85cb1492cacb275a070eb59c62d3bdef770927de2d825658af2c41e3657437

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