PDF malware analysis — malicious · f502aea55c1d87f3

MALICIOUS

PDF

84.9 KB Created: 2021-09-18 03:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 2344f752e117d82e3b690b38d87728b2 SHA-1: 2256fce5e7ceec889b4cbb981a1f488a8636fa17 SHA-256: f502aea55c1d87f3b2e0af3edbbae5bd0ef49b383aa449b5b6a7a84b0e4af64b

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, including one that appears to be a lure for specific content. The PDF's structure and the presence of JavaScript suggest it's designed to redirect users to potentially harmful websites, possibly for phishing or to download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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.
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://allytemp.ru/uplcv?utm_term=pakistani+movie+chal+mera+putt+2 PDF link annotation
- http://ajivikafinance.com/userfiles/file/fekodex.pdfIn PDF document text
- http://synergytaekwondo.com/click2buy_newp/userfiles/file/42656331620.pdfIn PDF document text
- http://evaemlak.com/userfiles/file///38162456178.pdfIn PDF document text
- https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/sitixigudif.pdfIn PDF document text
- http://ramenzoni.eu/userfiles/files/78983476836.pdfIn PDF document text
- http://360global.ca/userfiles/file/7687201285.pdfIn PDF document text
- https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/41338031972.pdfIn PDF document text
- https://onlinendttraining.net/files/93575692358.pdfIn PDF document text
- https://receptabc.hu/images_banner/files/nuzaxobenedopon.pdfIn PDF document text
- http://angelescare.com/userfiles/file/muduxutironusuduxunelu.pdfIn PDF document text
- https://eksiliotomotiv.com/upload/ckfinder/files/dawakikewosaxexal.pdfIn PDF document text
- https://aldapa.eus/files/galeria/files/53013930642.pdfIn PDF document text
- https://apsco.ly/userfiles/files/jobokomijezugipax.pdfIn PDF document text
- http://polipadel.com/userfiles/file/dijuwagalef.pdfIn PDF document text
- https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/40661182645.pdfIn PDF document text
- http://wmc21.com/ckupload/files/werelofirezirekus.pdfIn PDF document text
- http://netflor.pl/upload/File/kaxiso.pdfIn PDF document text
- https://incense888.com/uploads/files/202109091511114308.pdfIn PDF document text
- http://architettogherardi.eu/userfiles/files/tidafojemita.pdfIn PDF document text
- http://www.ujepites.hu/userfiles/files/satixadi.pdfIn PDF document text
- http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/dikegisanuzuresafabula.pdfIn PDF document text
- http://superlitefan.com/uploads/files/tijumifuvilutaroborana.pdfIn PDF document text
- http://gagutp.com/sa_upload/userfiles/file/20210911061219.pdfIn PDF document text
- http://fortwashington.abwingsmd.com/uploads/files/33936311838.pdfIn PDF document text
- https://lapdonline.org/file/25166517275.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_off0000e505.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE505	18016 bytes
SHA-256: `2498685ad2f1bdba1b0c9c692f797d30b9cf95889e82caa18d8e454af469cf79`
`font_01_sfnt_off00011433.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11433	11020 bytes
SHA-256: `e1dad1051135af08ce0ede91327b9c1660115ca246bcfdc76302af11c1ee8c38`
`font_02_sfnt_off00012db5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12DB5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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