PDF malware analysis — malicious · 33dd2a3dc2a4dd7b

MALICIOUS

PDF

92.1 KB Created: 2021-08-05 08:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 2bf10a24dc3d75c904cd173b6d00d2e7 SHA-1: c1e77a34e9aa3b643710d125a2bc468077cc0a2a SHA-256: 33dd2a3dc2a4dd7b73aff042636970f0e34c9cd0889ac91e9cbefc473f3b1dd2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised WordPress installations. This behavior is characteristic of a link farm used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9876

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.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160db124464241---17594122825.pdf In PDF document text
- https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/cc28ab009622e0554a07574d82302030/gapefimawejifuw.pdfIn PDF document text
- http://ttccid.com/userfiles/file/jikane.pdfIn PDF document text
- http://mnogonomerov.ru/uploads/file/wubagexofadabazup.pdfIn PDF document text
- http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/66834973248.pdfIn PDF document text
- https://nepalaviationmuseum.com/userfiles/files/87409106869.pdfIn PDF document text
- https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a11fa23aba9---73600560314.pdfIn PDF document text
- https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/63634415759.pdfIn PDF document text
- https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/2c701b69e3f8052ea31f2cd124fbc8d9/ripekududolokanafexe.pdfIn PDF document text
- https://castilloexterior.es/ckfinder/userfiles/files/fazinokukesijefuweje.pdfIn PDF document text
- https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/64aea83d70d31214e03949abba1c6a57/mogipebesepawejovulogewev.pdfIn PDF document text
- http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ed8abce795a---zizutezatafedur.pdfIn PDF document text
- http://struttur-arch.it/userfiles/files/fepavigizidi.pdfIn PDF document text
- http://mvdeastudio.it/userfiles/files/kutopotawokaresuniwuxij.pdfIn PDF document text
- http://kleni.cz/userfiles/file/dunutetima.pdfIn PDF document text
- http://rideabikenews.com/user_img/files/20014452264.pdfIn PDF document text
- https://hotelindigha.com/FCKeditor/file/59071626933.pdfIn PDF document text
- https://maconlux.lu/userfiles/files/wisip.pdfIn PDF document text
- https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/rqrtcijstpgfjm4k5o4on0fi6f/12873546358.pdfIn PDF document text
- https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2e58a5ac3---genepasezibodoxodixupofex.pdfIn PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/73iu77urh49jt8u418ej77bsi7/dajoritesolelomik.pdfIn PDF document text
- https://xn--b8qxb801j.tw/upload/files/48638164136.pdfIn PDF document text
- http://riskhedgetech.com/uploaded/file/119766639860922975d9c12.pdfIn PDF document text
- http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160766505e5240---98761294707.pdfIn PDF document text
- http://prabashproperties.com/ckfinder/userfiles/files/pabixekiremevepidubokowu.pdfIn PDF document text
- http://tasarimak.net/ckfinder/userfiles/files/bobevif.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=le+mod%C3%A8le+de+l%27atome+secondePDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ff39.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF39	10484 bytes
SHA-256: `89fbb4d89dc17bcdd7ba54f73c406d108860a79bb1e74f671d89789538e25b5b`
`font_01_sfnt_off000116c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x116C9	19460 bytes
SHA-256: `8cb42035b588efda3e6127df447629ac9a838044d24118a55a62611cafcf3951`
`font_02_sfnt_off00014756.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14756	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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