PDF malware analysis — malicious · 9b2d92382ce0c92e

MALICIOUS

PDF

85.3 KB Created: 2021-09-21 06:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 007685f4871da39445a0b68318be0a87 SHA-1: d34516aeab4fc29d6046ee398ce81de1cc08b71a SHA-256: 9b2d92382ce0c92eadb76ece2df002310b1759fc403a003b2973897c8f704da1

134 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and a large number of external URIs, many of which point to PDF files on disposable hosting. This indicates a likely phishing or malware distribution campaign, where the PDF serves as a lure to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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
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://krisoc.ru/uplcv?utm_term=best+android+mp3+tag+editor PDF link annotation
- http://wksx.top/images/userfiles/file/janim.pdfIn PDF document text
- http://backkwang.com/userData/board/file/62985170307.pdfIn PDF document text
- https://lighthousemacau.com/html_upload/file/tujazaxunebozozufelod.pdfIn PDF document text
- http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/kibifetajaxibo.pdfIn PDF document text
- http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/lewowanofu.pdfIn PDF document text
- https://amoslodge10.org/ckfinder/userfiles/files/91686793935.pdfIn PDF document text
- http://bkmarine.net/ckfinder/userfiles/files/1630612684.pdfIn PDF document text
- https://highlander-inn.com/assets/userfiles/files/74253634264.pdfIn PDF document text
- http://mnwebdesign.dk/userfiles/file/74448221695.pdfIn PDF document text
- http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16142acc5acda4---93624270594.pdfIn PDF document text
- http://safetruck.gr/images/file/8436004293.pdfIn PDF document text
- http://kenhuffbuilders.com/userfiles/file/nurotapijurevena.pdfIn PDF document text
- http://mascotdd.com/file_media/file_image/file/jonano.pdfIn PDF document text
- https://getadoc.in/ckfinder/userfiles/files/38685946422.pdfIn PDF document text
- https://karapinarinsaat.net/userfiles/upload/file/85924080637.pdfIn PDF document text
- http://brickchamber.com/ckfinder/userfiles/files/lufugamezalivuz.pdfIn PDF document text
- http://zhengfutz.com/v15/Upload/file/202191835258810.pdfIn PDF document text
- http://barrospizzadb.com/uploads/files/wosowus.pdfIn PDF document text
- http://progettogeometra.it/userfiles/files/suzuwoma.pdfIn PDF document text
- https://www.aspart.ro/ckfinder/userfiles/files/lavalarodugiguwodaxera.pdfIn PDF document text
- https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148539d2d13c---76102164547.pdfIn PDF document text
- http://sonnenheizung.ch/fckeditor/editor/images/file/78606543870.pdfIn PDF document text
- http://alompar.hu/uploads/content_files/files/todopekesobakotojibosisan.pdfIn PDF document text
- http://sqc.jp/user_data/editor/ckfinder/core/connector/php/upload/files/xejekiwabakokowigoxilufo.pdfIn PDF document text
- http://teresachild.com/upload/files/66736240556.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_off0000e746.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE746	10916 bytes
SHA-256: `592aaf99344c204c9abf21e5150d2eb442e41c05f003164756d27dfdf712eab1`
`font_01_sfnt_off00010057.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10057	18196 bytes
SHA-256: `e796c262f7a539e620f48edca369efc81093337fe4aac45d405e82929a474d1e`
`font_02_sfnt_off00012f33.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12F33	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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