Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ceaa04d77773424…

MALICIOUS

PDF

101.6 KB Created: 2021-06-25 17:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e78f809782a830980d4cf9103231a760 SHA-1: 678de32ffbb637bf00fe90a79a0883e9c49c9a46 SHA-256: 3ceaa04d777734246e8c12f90d5cef9562385e4c1400af3de749ab5dc12759f5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, some of which appear to be compromised WordPress sites. These links likely serve as a redirection mechanism to phishing sites or malware downloaders, as indicated by the ClamAV detection and ML classifier.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/ahsfd9k653p3lems0jtm5augsj/mimin.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/80a592b3cc468db389d59506be31b303/pufovamibubami.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/gebogila.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/ffe776da720f2b22577b930be675d8e5/doxixokiwivemotijaw.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/b8c5fa832671acea7abd9db96337ee65/67484857574.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce40650aeb---zulajo.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/5foq5cqkg73hk1sst7tmmnqmm5/53574003448.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/1b0601dd86edc48b6784a6605955549d/janigireluso.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f133718918---66019589074.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/7fe17ad9e2f45f407a54db1c8dc174ae/woxiliwubu.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/c48797860e01136f137f430fb3302da2/67622390238.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bffb15595---paxakolukisumuz.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/a9e116b5b6bca90300b95cfd1d6bedfd/tosesosuredoteroporunu.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/pkugd1oc54tpfv2re9pd4noh9q/73093769008.pdf
    • https://aimhc.com/userfiles/file/40865572666.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/69a0e2171ddfd158fd2968fd362abf64/velarusov.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160702fdd2d326---61014027295.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67f05a56e1---xulojiponar.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608654f5538af---vegoxarakarufe.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/52402724277.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764f6387fc6---6782518187.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec5a451654---xaxeripupinososi.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b72222008---telefegujipametevajeni.pdf
    • http://to-kajihan.net/js/upload/files/xijojujegukomiw.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/6a2eb381bb55e5310d10f495ec30f3b3/dikapexi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=protection+from+harassment+act+1997+injunction
    • 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_off00012a3a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3A 16792 bytes
font_01_sfnt_off0001424c.bin
75f49fd7da569b4ccc0886926626bcc118bfd41f54b0465a16e64ab30a767572
pdf-font-stream PDF embedded font (sfnt) at offset 0x1424C 17156 bytes
font_02_sfnt_off00016f0b.bin
86ae90aca0f54b8c44c69d563ec9e7d03631822b90de2070d4f9e4849ecc9743
pdf-font-stream PDF embedded font (sfnt) at offset 0x16F0B 11056 bytes