PDF malware analysis — malicious · 3c66e5103f01593b

MALICIOUS

PDF

90.6 KB Created: 2021-07-24 05:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 1db285c87ac2403aa9c7033560666cef SHA-1: 03d1885982b5d3fff282505f60f10a203ca11ac5 SHA-256: 3c66e5103f01593b2d9bc40d09f294ba96c7af4015edab339be9af17056caace

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 domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of numerous external URIs and link farm heuristics points towards an attempt to lure users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

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 https://rent-1.es/ckfinder/userfiles/files/narorosemubuxujagagutife.pdf In PDF document text
- https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606fcdbf3f371---44696055446.pdfIn PDF document text
- http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ec9835e1a6ae78ba33b69acc6024d718/64517224183.pdfIn PDF document text
- https://chetanaus.org/bheru/uploadfiles/file/70349149359.pdfIn PDF document text
- http://rambud.pl/uploaded/file/20170160850.pdfIn PDF document text
- http://tele-video.ru/upload/files/2463777958.pdfIn PDF document text
- https://myvideoclasses.com/ci/userfiles/files/57713888067.pdfIn PDF document text
- http://akinmedical.com/uploads/file/vubakebavufexigemat.pdfIn PDF document text
- http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b081a1f1fa4---47711901385.pdfIn PDF document text
- http://mospolytech.ru/storage//files/mogafuwenutidegomedezek.pdfIn PDF document text
- https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/tegvj3lu3152fv9dnepjkkcd48/nololemilitugaputefago.pdfIn PDF document text
- http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beaae620be3---wogevo.pdfIn PDF document text
- https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/f8688c23212a4a2f76e8ce9b8f9e489d/mozigara.pdfIn PDF document text
- http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086dc9d700aa---82247470076.pdfIn PDF document text
- https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/jrm3eu5re51lvsrrf4vkjbtmhj/74327340048.pdfIn PDF document text
- http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce6528c9d0---87476205532.pdfIn PDF document text
- https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/2s3o3ec4hf3hkl7et30ct8ra0t/17205801858.pdfIn PDF document text
- http://dajuicebarus.com/uploads/files/94317130180.pdfIn PDF document text
- https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/1d8c715095325ceb67746441174666d9/pinonewofux.pdfIn PDF document text
- http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a799667133b---milaziretimidedixu.pdfIn PDF document text
- https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084272839ecc---jafuzibanabekeregutesoza.pdfIn PDF document text
- http://www.corazondelsol.es/ckfinder/userfiles/files/48582587563.pdfIn PDF document text
- https://ms02bet.com/contents//files/zutovepufamekevim.pdfIn PDF document text
- http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b8349f7b761---16762193680.pdfIn PDF document text
- https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/951ae8b2fbc9d12afe64889760146598/79879897516.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=ppt+metode+riset+akuntansi+keperilakuanPDF 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_off0000faf7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAF7	10744 bytes
SHA-256: `c99f5ed940a6a67be880795ad45be8454664ccd7bdac6b0dc5d2ebbb9c1989e9`
`font_01_sfnt_off000113a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x113A0	18028 bytes
SHA-256: `02d53459ce711b03c1fc8b26bdb8a5d4c46d25a886060dc926c152db00991261`
`font_02_sfnt_off0001435f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1435F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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