PDF malware analysis — malicious · c0d735f02259350a

MALICIOUS

PDF

75.4 KB Created: 2021-09-17 20:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: ebaca579a1661954c7b0eb66c3a58c9c SHA-1: 4c2580074cac5b5c01f3769d79192bfeff22ba53 SHA-256: c0d735f02259350a6bba58125837d8d0f267ee83442676e7f6d54d5d249e8063

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and numerous external URIs pointing to compromised websites, suggesting it's designed to host a link farm. The primary purpose appears to be directing users to potentially malicious content or phishing sites, likely through a spearphishing attachment delivery vector. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

Heuristics 7

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.
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://queure.ru/uplcv?utm_term=the+godfather+book+download PDF link annotation
- https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/9852db6ade1033a8119d4ac336875c25/68335372454.pdfIn PDF document text
- https://auto826.vnpec.xyz/uploads/files/jebuzamuzidamevejik.pdfIn PDF document text
- http://kolesnikov.pro/ckfinder/userfiles/files/dipulilusil.pdfIn PDF document text
- https://paradigma.bg/uf/file/wofetaxutoxumokemaniverob.pdfIn PDF document text
- https://3drm.bg/uploads/pictures/files/nunesanubejof.pdfIn PDF document text
- https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6c0e27fe3---duvegomet.pdfIn PDF document text
- http://daiwavn.com/uploads/image/files/fugagabipepip.pdfIn PDF document text
- https://castilloexterior.net/ckfinder/userfiles/files/51568660699.pdfIn PDF document text
- http://cateringkieuan.com/uploads/userfiles/file/jivusizubaj.pdfIn PDF document text
- http://i-harmonics.com/upload/files/nurezurizo.pdfIn PDF document text
- https://feniks9.ru/ckfinder/userfiles/files/wexezikufuxibuzetepilumer.pdfIn PDF document text
- http://stacjaregeneracja.pl/userfiles/file/rozavekawuba.pdfIn PDF document text
- http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613394659b0be---29962773258.pdfIn PDF document text
- http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/jumosorapa.pdfIn PDF document text
- http://stickers-moins-cher.com/userfiles/stickers-moins-cher.com/file/kiginategerujezugoxodexuv.pdfIn PDF document text
- http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/laduxufigojebipim.pdfIn PDF document text
- http://abwmountvernon.com/uploads/files/gizonutaluzimijime.pdfIn PDF document text
- https://littleedupark.com/ckfinder/userfiles/files/favamutukofigufadam.pdfIn PDF document text
- http://jrecchina.com/ckeditor/ckfinder/userfiles/files/55138446501.pdfIn PDF document text
- https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132aaea349da---xoxutigilalogazedaxejef.pdfIn PDF document text
- https://limsurdua.com/contents/files/44179263174.pdfIn PDF document text
- http://keitbg.com/images/files/10217099512.pdfIn PDF document text
- https://ritascreation.com/userfiles/file/rumilijadosusikawo.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_off0000bb7a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBB7A	19820 bytes
SHA-256: `1bb710677dcc7fd77c306f6e9335a087008329a888b48bc3331615a48173bb49`
`font_01_sfnt_off0000ef85.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF85	10652 bytes
SHA-256: `8b2975f88327b1287efea3789d15f6fd88def55cdb6acfcb01e2c9a754d2a2e6`
`font_02_sfnt_off000107bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107BB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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