PDF malware analysis — malicious · cc275e63b4c83ee9

MALICIOUS

PDF

82.8 KB Created: 2021-08-30 03:36:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 77e04f5bbb1f77ba8e3fcf365b222e8b SHA-1: 9d48638dc658d3b9ef5d2d1cea8682befe15eb39 SHA-256: cc275e63b4c83ee9ec47185f16eccbd3f9a44f94529d0ee69135ff96f4166cfb

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. It also features numerous external URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely involving redirection to malicious content or further payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9983

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://drafthe.ru/uplcv?utm_term=charlotte+knights+shop PDF link annotation
- http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df63f43018---vovawu.pdfIn PDF document text
- http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcef9cd538---40493444601.pdfIn PDF document text
- https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075eccd4670b---1404309040.pdfIn PDF document text
- http://omonetach.pl/foto/ilustracje/file/joperewagoxo.pdfIn PDF document text
- https://clubon.top/uploads/files/batinufumow.pdfIn PDF document text
- https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/b65481316c1796cbd7388996e6b21cbe/19603225202.pdfIn PDF document text
- https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16095d363403e8---22348289267.pdfIn PDF document text
- https://www.aukuras.org/ckfinder/userfiles/files/sutawutikovuw.pdfIn PDF document text
- https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/edc8dedb9adf400aecec1ee758794999/82219615654.pdfIn PDF document text
- https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609402e8467fd---sibazapulu.pdfIn PDF document text
- https://juraganmonyet.com/contents//files/60344734330.pdfIn PDF document text
- https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/5u3rfeodut78l9ds80tqnucqmu/8751802851.pdfIn PDF document text
- http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/b46c94d6a97f2f3168aea62fb0ae774e/96034956947.pdfIn PDF document text
- http://losmarinoslanzarote.com/marinarubicon/admin/file/65756099784.pdfIn PDF document text
- http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a238f0890---nixoxam.pdfIn PDF document text
- https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071b645eb2ec---zavorofisuzulu.pdfIn PDF document text
- http://vivo-mebel.ru/upload/file/54516057316.pdfIn PDF document text
- https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/161233c902d564---lazasatenolew.pdfIn PDF document text
- http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca27650b9d---42168076285.pdfIn PDF document text
- https://agermag.ro/mm/file/59330597056.pdfIn PDF document text
- http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160942f62af9cf---4589080518.pdfIn PDF document text
- https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/3490320054.pdfIn PDF document text
- http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf353772e1---narizelimirilirufip.pdfIn PDF document text
- http://technoauto.jp/js/upload/files/kepidobewawatozifeposanul.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_off0000da61.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA61	19036 bytes
SHA-256: `4b9fe7250562e88cd28dfd192e8c6d8015e47315b9c26f260a7fc89a801aef6d`
`font_01_sfnt_off00010c64.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C64	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001247b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1247B	10656 bytes
SHA-256: `9205b98c8fe93cdad1ee6fa3b899c80affff49b08ee342407e81ccfc51ce3e1f`

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