PDF malware analysis — malicious · 215452c99bb3b709

MALICIOUS

PDF

78.5 KB Created: 2021-07-08 13:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 5d2f608b21b0c1718fa39991dbb310b1 SHA-1: 47061f941fdc6432de287574c1682361666b460d SHA-256: 215452c99bb3b7094208d8353587e7fdbe1d0f3f5dd45946ff5f33a14c0ef17a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to compromised websites, indicating it functions as a link farm designed to redirect users to potentially harmful content. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9844

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://irlanc.ru/uplcv?utm_term=name+start+with+r+for+boy+with+meaning PDF link annotation
- http://goldenbaycruisesagent.com/userfiles/file/magotidopofibeguvap.pdfIn PDF document text
- http://artecgroupservices.com/imagenes/file/71494608751.pdfIn PDF document text
- http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073e5077cafc---togokiv.pdfIn PDF document text
- http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160be4d3c4d310---fatoxosamidotadezugamote.pdfIn PDF document text
- http://aeronautike.com/userfiles/file/18450898835.pdfIn PDF document text
- http://ladakhtripmaker.com/userfiles/files/2871395577.pdfIn PDF document text
- http://kardelendalgicpompa.com/uploadfiles/file/58039582931.pdfIn PDF document text
- https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/rujj3ipub2ce2ppfpvgksl9b7e/lezakunonu.pdfIn PDF document text
- http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160870a0046be2---36068546541.pdfIn PDF document text
- https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/f36b4b0c7561ea895330605c7a2096f2/86878545525.pdfIn PDF document text
- http://classicalgardenstatues.com/uplds/file/jewidetojuguluxojos.pdfIn PDF document text
- http://re-view.online/fckFiles/file/mabirozogunanij.pdfIn PDF document text
- http://dragonera.cn/admin/userfiles/file/pewuvimefog.pdfIn PDF document text
- https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082a9efa15ab---35224757629.pdfIn PDF document text
- https://honghow.com/ckfinder/userfiles/files/59380323254.pdfIn PDF document text
- http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7d9fbd438---5930779607.pdfIn PDF document text
- http://acecaalcoy.com/userfiles/file/94154234429.pdfIn PDF document text
- https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf3db90548---dukopalalipufago.pdfIn PDF document text
- https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/ttbopb5snl6sb29ogo4j3p4k8m/27682494696.pdfIn PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/504tf8m49hu3d3i15rc3uadq77/dosonexakad.pdfIn PDF document text
- http://joyear.com/ckfinder/userfiles/files/89449375943.pdfIn PDF document text
- https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c30a3d77f---48235848106.pdfIn PDF document text
- http://andlupa.com/userfiles/file/29981553101.pdfIn PDF document text
- http://asesorgubernamental.com/images/file/7898347268.pdfIn PDF document text
- http://alphasigmaoverseas.com/userfiles/file/29365289634.pdfIn PDF document text
- http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c149acdf4d5---70626295322.pdfIn PDF document text
- http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160affc9332d52---sezananukuzekoneser.pdfIn PDF document text
- http://meandnetworking.com/ckfinder/userfiles/files/39547120590.pdfIn PDF document text
- 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_off0000ced3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCED3	10932 bytes
SHA-256: `93e9d436f951de25b030be74dbcca2f4c83a1db800ce4e09b69f2ca226d9777e`
`font_01_sfnt_off0000e817.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE817	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010029.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10029	17156 bytes
SHA-256: `b27df1f47cc1cdce7a4af83f6d80f65f4b7b279346ee1980d444b01b31f97cf0`

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