PDF malware analysis — malicious · f18fe358f1b6d046

MALICIOUS

PDF

74.2 KB Created: 2021-09-20 18:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 60ba60fc6b51f13b4bd6f62ff7abcfb9 SHA-1: 1af9675f33717937bbd92c3b60ca142e64780671 SHA-256: f18fe358f1b6d0469160f65b5d23328e219fbf0581b341fe54981a9a5bf02fd3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites and disposable hosting. These links likely lead to phishing pages or serve as a distribution point for further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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://infrive.ru/uplcv?utm_term=index+of+the+big+bang+theory+season+11 PDF link annotation
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c4506d226---feridoteradez.pdfIn PDF document text
- https://esprimagroup.com/userfiles/file/20795309524.pdfIn PDF document text
- https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613f542b98be0---10251500734.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ee84200c6---rebudepasuperer.pdfIn PDF document text
- https://bkairconditioner.cloud4demo.com/uploads/files/7123224686.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c1b4413b6---83133917942.pdfIn PDF document text
- http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16140669fda032---45968691891.pdfIn PDF document text
- https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16145b2a0e7d74---17232147218.pdfIn PDF document text
- https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/0b40ab87d9a2f1ecd0e6eda0573b1676/jujurabu.pdfIn PDF document text
- https://vibanghanoi.com/uploads/files/6064159944.pdfIn PDF document text
- http://dasbluemchen.com/5493954206.pdfIn PDF document text
- http://giaydantuongphongngudep.com/images/news/file/56482484995.pdfIn PDF document text
- http://inannamsao.com/uploads/files/73106913486.pdfIn PDF document text
- http://hitecds.com/userfiles/file/faguponeti.pdfIn PDF document text
- https://milosislandrooms.gr/userfiles/file/43928475238.pdfIn PDF document text
- http://deforma.it/userfiles/files/xaratukadovubizesibituwa.pdfIn PDF document text
- http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/dd10cb17761dfd06a797f43640fb8507/pogekigasajenine.pdfIn PDF document text
- http://solis.altrodesign.eu/ckfinder/userfiles/files/59481423955.pdfIn PDF document text
- https://eagleegg5k.com/ckfinder/triplebuserfiles/file/kikasowavebodilifupafafuw.pdfIn PDF document text
- http://metall-press.ru/files/63184285857.pdfIn PDF document text
- https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/69b24707dce1ad5527a19b49096d4a6b/90878620942.pdfIn PDF document text
- https://fanaf.com/article_ressources/file/xironijoxilewukoji.pdfIn PDF document text
- http://terhautz.com/upload_files/files/fuguferaxorukujemu.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_off0000be7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBE7F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d696.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD696	10944 bytes
SHA-256: `77e7654e953060c1f9afb8f117df9d001dbd901bbe26b22687a25d734c874d86`
`font_02_sfnt_off0000efbd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFBD	16880 bytes
SHA-256: `9894a220c36b363d59ef162cb2590bf5d42aa3b853e855b531ab3a8b4768947c`

Open this report in the interactive analyzer, or submit your own file for analysis.