PDF malware analysis — malicious · fda448b1fd92b9f3

MALICIOUS

PDF

96.1 KB Created: 2021-07-07 01:24:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: f211b97d4da797070751f563ab752f1f SHA-1: cd59db323882fd414088a6ec8d92eccc080cf6c4 SHA-256: fda448b1fd92b9f344cde6c40d542d0650fa1e52265b745bc77425def7f7f28b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to potentially compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9820

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.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810391003d7---nivovesoxogozapuke.pdf In PDF document text
- http://smflow.in/admin/uploads/file/furokivatexasevowomelet.pdfIn PDF document text
- http://myphamlulanjina.com/upload/files/3028708513.pdfIn PDF document text
- https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a24256cbc91---90959284954.pdfIn PDF document text
- https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/a6adf8d970e04cb1a94c34a7240231a5/53616378166.pdfIn PDF document text
- http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/f451992332c7c2e58798d520fa16e0df/fobasanesidasisawewow.pdfIn PDF document text
- http://arcadia1973reunion.com/clients/3/33/33cb7023d77084166ed027ca16b579b7/File/66745156613.pdfIn PDF document text
- https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c865054cfca---pijusenirekilowusijomufop.pdfIn PDF document text
- http://mientrungpetrohotel.com/users/files/76867757403.pdfIn PDF document text
- http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087cc4ce2235---mimagokaxapekezafav.pdfIn PDF document text
- https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/bef6bae1e2a1dc45a7fab93ab1c1a2c2/vubogalubaxuxuwaz.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/2a11038b82217b9322c077f1582bf3a8/simipimiberi.pdfIn PDF document text
- http://harchovyk.com/userfiles/file/45869385590.pdfIn PDF document text
- http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a51f7df24f7---34476694525.pdfIn PDF document text
- https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16080d8de06913---85821406587.pdfIn PDF document text
- https://hyundaia.ru/userfiles/file/30293271295.pdfIn PDF document text
- https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee9cbb41fb---66752132604.pdfIn PDF document text
- http://angelojrobles.com/admin_initial_test/userfiles/file/pobarakibajorilu.pdfIn PDF document text
- https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608582054402f---lifumozulotoxujusogemax.pdfIn PDF document text
- https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/sejp1qnovkfol7aipod51bkqmn/1241266189.pdfIn PDF document text
- http://grafordexstudents.com/clients/0/05/05b3dbe7dd9dc6f92b523d2b721f2ffd/File/9952404559.pdfIn PDF document text
- https://avenue102.com/uploads/file/27033510796.pdfIn PDF document text
- http://mujuerp.com/uploads/ckeditor/files/20210605175822.pdfIn PDF document text
- http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f1vjtsnl0a5hsi1ogftqpugme7/48166969461.pdfIn PDF document text
- http://ackerviewguesthouse.com/userfiles/file/simubevivegudijas.pdfIn PDF document text
- https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/6f3261952d24ca36331e82b6df38008c/nufebiviwenabufegepe.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=what+year+were+you+born+if+your+21PDF 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_off00011150.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11150	10704 bytes
SHA-256: `e9e1ace24f2315f07f46a31b60f74ead43aa4e515db3bc45a5c55181e356bcd5`
`font_01_sfnt_off000129f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x129F5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00014207.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14207	18048 bytes
SHA-256: `4b94cc053d1b97fbf3a9e2fecc6f75d32865558cf9542278e06366f4162242c0`

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