PDF malware analysis — malicious · 52f61fbb3468a106

MALICIOUS

PDF

91.4 KB Created: 2021-10-19 21:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: 955ed450767e1e904082b01b44412a27 SHA-1: 852f2e57c961812c2ee76f77a068459c08b732b0 SHA-256: 52f61fbb3468a106d3e067528d3b4ad1b6d848dba4ac9045fcba5101983c6022

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which point to other PDF files hosted on disposable domains, indicating a link farm designed to obscure malicious activity. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure that aims to trick users into downloading further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9968

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://crysiq.ru/uplcv?utm_term=how+to+update+mxq+4k+firmware PDF link annotation
- https://scmsgroup.org/ckfinder/userfiles/files/57088396183.pdfIn PDF document text
- http://wasserburg.pl/userfiles/file/62487478323.pdfIn PDF document text
- http://carszana.com/image/upload/File/kevoriwol.pdfIn PDF document text
- http://pscemetery.com/userfiles/file/50591374214.pdfIn PDF document text
- http://metabolit-plus.ru/files/file/setujabikegasen.pdfIn PDF document text
- http://www.kickcommerce.com/userfiles/file/59497241659.pdfIn PDF document text
- http://gekon.net/userfiles/file/35653584759.pdfIn PDF document text
- http://www.premiumimport.nl/ckfinder/userfiles/files/jumobevubipobur.pdfIn PDF document text
- http://westernmaki.com/uploads/files/lipakinodod.pdfIn PDF document text
- http://mehmetrasimmutlu.com/icerik/file/vifukejozuvazidonerutoz.pdfIn PDF document text
- http://rqconsultores.com/userfiles/file/venazig.pdfIn PDF document text
- http://aprt1day.ru/file/33730116846.pdfIn PDF document text
- http://cncostruzioni.com/userfiles/file/daxebonudarema.pdfIn PDF document text
- https://parkettworld.com/upload/files/xugezepasobiruv.pdfIn PDF document text
- https://tourgardan.com/basefile/tourgardancom/files/wubazemirominefefubelofu.pdfIn PDF document text
- http://inventory-acepipe.com/images/uploads/files/18627290477.pdfIn PDF document text
- https://alasclub.gr/neuro/ckfinder/userfiles/files/fevitafiluzexomuxunanika.pdfIn PDF document text
- https://nikunjfoundation.org/ckfinder/userfiles/files/zaxidizepopo.pdfIn PDF document text
- https://sogelec-eng.com/files/ckfinder/files/65405505628.pdfIn PDF document text
- https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/6ce0cb4c123b6b36deb0ebe828bca662/wixawigureguxog.pdfIn PDF document text
- http://kawana.tech/userfiles/file/21981747932.pdfIn PDF document text
- https://nikoljski.com/ckfinder/userfiles/files/gubivebar.pdfIn PDF document text
- http://sake-tori.com/images/library/File/89796587122.pdfIn PDF document text
- https://saptabangunmanunggal.com/indomobils/upload/file/22395562513.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_off0000fc59.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC59	10936 bytes
SHA-256: `ccb51bdc0b73399d0262970d7b3d045713dfd4f2ba37a33a28f8e565fdd74778`
`font_01_sfnt_off0001158a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1158A	19656 bytes
SHA-256: `d8c9bfdd5707aee7bae98579ba933221cd0bdf812cf3ec49443fcfbc13a66ee3`
`font_02_sfnt_off000147ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x147AC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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