PDF malware analysis — malicious · c83a6065aa1a8f59

MALICIOUS

PDF

81.0 KB Created: 2021-09-12 09:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: 6ca1f8b37ededa02fcb36ec8169d676f SHA-1: e4203e0e5f08d582bc44d15bc2f255c1ac4733a9 SHA-256: c83a6065aa1a8f5925726bfb7b5efefafe15620086e0f1a4328dfae8ef7bbc5f

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains numerous embedded URLs, many of which point to PDF files hosted on disposable domains, suggesting a link farm designed to redirect users. The presence of 'utm_term=download+ldplayer+3.0' in one URL indicates a potential lure for software downloads, which is a common tactic for distributing malware or unwanted programs. The ClamAV detection further confirms its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

Heuristics 5

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.
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=download+ldplayer+3.0 PDF link annotation
- https://budgetparking.ca/admin/uploads/file/95690229243.pdfIn PDF document text
- http://foodchemsino.com/d/files/marusebixotive.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161340110e3de3---wukurerujikilalusaw.pdfIn PDF document text
- https://cherrychile.cl/cherry/uploads/contenido/files/xabuxi.pdfIn PDF document text
- http://strahyi.ru/images/file/55676488188.pdfIn PDF document text
- http://studiolegaletrotta.eu/userfiles/files/49652172549.pdfIn PDF document text
- http://meadescafe.com/userfiles/file/dulalefugaveg.pdfIn PDF document text
- https://galaxytraining.examinationonline.com/files/tomexovusu.pdfIn PDF document text
- http://jianianhuayule.a9188.com/upload_files/art_files/files/20210906_123833.pdfIn PDF document text
- http://www.jindatunnel.com/up_files/file/xixali.pdfIn PDF document text
- https://hgindustrial.eu/userfiles/files/zadelizateviroja.pdfIn PDF document text
- http://kolesnikov.pro/ckfinder/userfiles/files/vazixudulexewakugaw.pdfIn PDF document text
- http://getdol.com/page_data/file/1362430833.pdfIn PDF document text
- http://baove24h.info/upload/files/4189659737.pdfIn PDF document text
- http://terfigyelokamera.info/files/file/kinorexuloza.pdfIn PDF document text
- https://wonwon.taipei/photo/file/66802216044.pdfIn PDF document text
- http://dinhvi5s.com/images/newtech/files/datugepiwak.pdfIn PDF document text
- http://nicenpos.com/userData/board/file/6505731051.pdfIn PDF document text
- http://kulturazebrak.cz/userfiles/buxonilifero.pdfIn PDF document text
- http://turchifiltri.com/userfiles/files/pexinifanuzepawu.pdfIn PDF document text
- http://htwy.com/upload/file/68906543815.pdfIn PDF document text
- http://grafosaleservice.cz/images/fck_editor/file/nugitugelum.pdfIn PDF document text
- http://think6.net/ckfinder/userfiles/files/20210905232507.pdfIn PDF document text
- http://tnslib.tools/userfiles/files/jabumidorejivunedub.pdfIn PDF document text
- http://kaupa.cz/userfiles/file/51270664554.pdfIn PDF document text
- https://wfca-czech.cz/temp/userfiles/files/93890055211.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_off0000d7eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7EB	17540 bytes
SHA-256: `57e06f459d7c03f603fedeb3d13087b0177cb8157e40b7743229d211bac29e59`
`font_01_sfnt_off000105d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105D2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011de9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DE9	10588 bytes
SHA-256: `6185b33d2621516a4222ad253259b3a0fbe5b484ba579e86becb6ad3084c77c4`

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