Malicious PDF — malware analysis report

Static analysis result for SHA-256 b784d402242497d0…

MALICIOUS

PDF

84.9 KB Created: 2021-10-22 15:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5e97037ba00dd3677913c5d650f35b25 SHA-1: 1f1f32e4bc69dd3c511ac8e102e9792ed6c4cd5e SHA-256: b784d402242497d0e608866bf7b02455df9b926b9e7305195a92f7bd6a31a5f0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting. These links likely serve as a link farm to lure victims into downloading further malicious content, as indicated by the ClamAV detection and ML classifier flagging it as a phishing trojan. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://people11people.com/uploads/File/kovemokinimokuzipiliwuba.pdf In PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614949f8bfce4---vofis.pdfIn PDF document text
    • http://marikitaberbagi.com/userfiles/file/wodetobumudej.pdfIn PDF document text
    • http://isotech.si/uporabnik/file/ramukakej.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/66373522855.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/60198220063.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/50406566528.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/40554807488.pdfIn PDF document text
    • https://otomatcilarmetal.com/otomat/upload/files/sumiresomudo.pdfIn PDF document text
    • https://legacytwirlers.cornerfamily.com/userfiles/files/87906662139.pdfIn PDF document text
    • http://hrudolf.com/userfiles/gomedesenetepiratog.pdfIn PDF document text
    • http://crestviewshopping.abwingsmd.com/uploads/files/19334660276.pdfIn PDF document text
    • http://www.nachtruhe.info/up/files/55970737694.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/panikuxo.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1615fc0dfdd6dc---luwuluxe.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210901151515.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1616c057c68b47---konazekilutaviz.pdfIn PDF document text
    • https://vyrukrc.lt/userfiles/file/regeg.pdfIn PDF document text
    • https://bachson.net/upload/file/1478447537.pdfIn PDF document text
    • http://slovbau.sk/test/userfiles/file/femazatev.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/48890399475.pdfIn PDF document text
    • http://sbcnepal.com/images/file/vomukekadidipawunopawaso.pdfIn PDF document text
    • https://chatsystem.site/js/ckfinder/userfiles/files/85351566368.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/10527687856.pdfIn PDF document text
    • http://hlqh.net/userfiles/file/20210925174847_829545529.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/RhDyTiV0TgQ/uplcv?utm_term=imrad+example+research+paperPDF 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_off0000e3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B5 19380 bytes
SHA-256: 3cf2c98abcbdc635839fc0ccb21b7d897fe058b88cce197a9752ef7c128dcdc9
font_01_sfnt_off00011609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11609 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E20 10420 bytes
SHA-256: a7111a09bf89851878f9209656e24c9e3f29f05b4d645266d9a2fe269c4f6064

Open this report in the interactive analyzer, or submit your own file for analysis.