PDF malware analysis — malicious · 9693ba4b727848a9

MALICIOUS

PDF

83.2 KB Created: 2021-09-12 15:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 788e1df62f240c311765d2decb6b7049 SHA-1: 6d11ce9085e2e824b1dd57c5380ddd37607d4b6a SHA-256: 9693ba4b727848a98e115fd9e11abae200b8d42e27e8bddd4b3d9f7df2be0e10

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, suggesting it functions as a link farm or phishing lure. The PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful websites, aligning with spearphishing attachment tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

Heuristics 5

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.
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://archism.ru/uplcv?utm_term=monster+manual+1977+pdf PDF link annotation
- http://envisystem.com/upload/userfile/files/71528386085.pdfIn PDF document text
- https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/71526991287.pdfIn PDF document text
- http://qdsenfeng.com/data/files/9506371176.pdfIn PDF document text
- https://autosaloncenter.com/uploads/file/pureza.pdfIn PDF document text
- https://tourgardan.com/basefile/tourgardancom/files/57794078748.pdfIn PDF document text
- http://fishtech.org/uploads/userfiles/file/file/sevizadiwoxosusakiz.pdfIn PDF document text
- http://ssaisarang.com/ckfinder/userfiles/files/62383870204.pdfIn PDF document text
- http://scandinavia-ex.com/images/blog/file/jumirul.pdfIn PDF document text
- http://les-dvorik.ru/userfiles/file/42952421928.pdfIn PDF document text
- https://sportsslife.net/upload/ckfinder/files/zobuwinabarelitobus.pdfIn PDF document text
- https://marblobaths.com/app/webroot/img/files/kegadavonug.pdfIn PDF document text
- http://flex-link.cn/uploadfiles/files/12713532117.pdfIn PDF document text
- http://aranysolyomfeszke.hu/editor_up/zalixilusijali.pdfIn PDF document text
- http://signauction.net/userfiles/file/65178177864.pdfIn PDF document text
- http://bajcsidavidfoto.com/_user/file/doginidudegufawom.pdfIn PDF document text
- http://food-cloud.com/home/food-cloud/www/site/site/data/files/dopiposugagamusedufasito.pdfIn PDF document text
- https://mayphotocopydogia.com/upload/files/jomiduwisa.pdfIn PDF document text
- https://mar3ol.com/Files/files/xemupaletevejarevowopijal.pdfIn PDF document text
- https://emons-verlag.com/testarea/cwsCMSlight/media/files/3613622592.pdfIn PDF document text
- http://phantasos.org/userfiles/file/2307020504.pdfIn PDF document text
- https://psfund.org/public/uploads/files/cms_files/49980824126.pdfIn PDF document text
- https://kaptenhoki.info/contents/files/bakojisadigegodava.pdfIn PDF document text
- http://fashioneducation.ru/userfiles/file/94647311565.pdfIn PDF document text
- http://euro520.net/userfiles/file/1631369284546488389.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_off0000e17b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE17B	10928 bytes
SHA-256: `fec1ce0159a89457591432d75d46a71dccd73e03fa15fb8091f5588c7c44a22e`
`font_01_sfnt_off0000faf1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAF1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011303.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11303	17232 bytes
SHA-256: `c73e9866011a4a47a4027933cc3651c5aa8b5cd0e28aa05ff62f5d950b5fbe26`

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