PDF malware analysis — malicious · 59c6c47ade442cfc

MALICIOUS

PDF

74.1 KB Created: 2021-09-01 08:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 100ef83b7bb2d322d411199a2c5d18a7 SHA-1: 2e6ec1b5d25cffeb7137dcf18fcbd8c8d692f3c7 SHA-256: 59c6c47ade442cfc39522e91a24477aa3387398d9d728065144508c0101cd9f0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The embedded URLs and the nature of the heuristics strongly indicate a phishing or redirection attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

Heuristics 6

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.
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.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d4004a292f1---webibemukosena.pdf In PDF document text
- https://mimpishio1bet.com/contents//files/96944670598.pdfIn PDF document text
- https://unique.global/wp-content/plugins/super-forms/uploads/php/files/04328ac75618b3186f88191a3a9367db/divevupu.pdfIn PDF document text
- https://galedo.cz/www/data/cms_files/files/ronutakuvojubusulexaxi.pdfIn PDF document text
- https://ctsgroups.asia/images/file/91651567442.pdfIn PDF document text
- https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611a175d17d74---dozidoziximisijeso.pdfIn PDF document text
- http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16085d465d4d17---37809756483.pdfIn PDF document text
- https://liniagdanskzydowo.pl/files/99754264684.pdfIn PDF document text
- https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/6d3c4f07b4b6d378a16edacd66ae2043/2402811084.pdfIn PDF document text
- http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/totevamugizetokidunav.pdfIn PDF document text
- http://ksnjl.com/userfiles/files/tajagugisosexosexo.pdfIn PDF document text
- http://cokhisah.com/webroot/img/files/16296646176.pdfIn PDF document text
- https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ed9cce7e85719d0335ea96733dc1e07e/37492347438.pdfIn PDF document text
- http://tnmetalworks.com/images/files/zufupeba.pdfIn PDF document text
- https://ccskin.com/geektic/files/jegujosatejijixerowa.pdfIn PDF document text
- http://elementsgogreen.com/userfiles/file/fupigozeweli.pdfIn PDF document text
- https://123natura.com/stockages/files/vopefujojufekorilexepoved.pdfIn PDF document text
- http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160a34dc038ef2---78944996502.pdfIn PDF document text
- http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9633bd903---wogusomewew.pdfIn PDF document text
- http://sporteambiente.it/ckfinder/userfiles/files/71893493926.pdfIn PDF document text
- https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/suuvc4pffi7q2hlno9gnsn4ns5/86308078801.pdfIn PDF document text
- http://4seasonstours.in/userfiles/file/9038640162.pdfIn PDF document text
- https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715549f0004---31531381427.pdfIn PDF document text
- https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c47a09dc8b---7803745054.pdfIn PDF document text
- http://www.masozilina.sk/ckfinder/userfiles/files/birikutori.pdfIn PDF document text
- http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f85e874c8---95692468406.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=sports+that+require+flexibilityPDF 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_off0000c202.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC202	11028 bytes
SHA-256: `2a1b776c97d64e04e6a869dff9039319bc1cea33bfbfc43edeb1c423e040732c`
`font_01_sfnt_off0000db9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB9D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f3af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3AF	15512 bytes
SHA-256: `d10d61308bb026cb9619e62fcd315082d127832cae32409a57ca1245f614eec7`

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