PDF malware analysis — malicious · c01f9a850d66cfb9

MALICIOUS

PDF

79.3 KB Created: 2021-09-01 06:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 9c899b752a86acef8adaf96ed33c1ba2 SHA-1: 7918cc116c7f0eedb5ef6461ce6f18624040fb5c SHA-256: c01f9a850d66cfb9c2ab6579e56299bff6474808e89f29a4da690f32451ef3e8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting, likely to redirect users to malicious content or phishing pages. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to lure users to external, potentially harmful, resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

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://cructi.ru/uplcv?utm_term=coldplay+life+in+technicolor+live PDF link annotation
- https://kaisar168.com/contents//files/govunutugo.pdfIn PDF document text
- http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/47e8acf34dd7e18b3da930cf2fe79429/12315353924.pdfIn PDF document text
- http://tunesistudio.eu/userfiles/files/90064382764.pdfIn PDF document text
- https://campermagazine.tv/public/file/86884027161.pdfIn PDF document text
- http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/2857236b28d7fba3a33e14f5ade7300e/vanubozokebinexidi.pdfIn PDF document text
- https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/685d1d8de2196cd2be79031e2b6052dd/zufagejalugudamivebakavo.pdfIn PDF document text
- http://infinity-pro.ru/userfiles/file/87671356059.pdfIn PDF document text
- https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/jfk8p3nulqjcj6bqsdmha0r3m2/revadefulisi.pdfIn PDF document text
- http://theartofdesign.nl/ckfinder/userfiles/files/juvedodukagi.pdfIn PDF document text
- http://signauction.net/userfiles/file/gaxejikepuvevotopezam.pdfIn PDF document text
- https://binarbaidfabrication.com/public_html/userfiles/file/1059782533.pdfIn PDF document text
- https://hagabb.ro/ckfinder/userfiles/files/1774451842.pdfIn PDF document text
- https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/352e1a198587bf4d9747ad416770d216/2723270548.pdfIn PDF document text
- https://calmoinc.com/upload/editor/file/jufuketurebilawonizezomug.pdfIn PDF document text
- https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a835b799fa5---wepudosurofifigoju.pdfIn PDF document text
- https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/8d943b44a7ac11f6e9742313612c508e/mejivelediwa.pdfIn PDF document text
- https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/9d16f54f08cc8bc8266e57dca82fe1df/wiletomeporesomulal.pdfIn PDF document text
- https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/d0e48fc1a85c587fdcbf0fcfcaafa588/bujesisas.pdfIn PDF document text
- http://eksternest.be/images/file/wigobigedex.pdfIn PDF document text
- https://afayl.com/userfiles/file/69362492380.pdfIn PDF document text
- https://dellrein.ru/content/file/25646836905.pdfIn PDF document text
- http://metallpress.ru/files/tilowadojimamonodopo.pdfIn PDF document text
- https://internationalmedia.com/userfiles/file/boramepuweragikedikojo.pdfIn PDF document text
- https://miaousland.fr/ckfinder/userfiles/files/zeminuresofiwabi.pdfIn PDF document text
- http://geteffective.biz/uploadfiles/file/4907131024.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_off0000cf58.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF58	17572 bytes
SHA-256: `150e84a613c18b4d70b1e55a5cbfb2dd66425c865c8f167f634768fc2105234f`
`font_01_sfnt_off0000fd2d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD2D	10760 bytes
SHA-256: `649aa9ebd3469282da9b416898e91d5fc9a9443f8d2c4fa5a6eee294eed47bf6`
`font_02_sfnt_off000115e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x115E2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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