PDF malware analysis — malicious · 48279518faf93498

MALICIOUS

PDF

79.0 KB Created: 2021-09-17 02:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: f60ce476a0781ae6a14d90b19fdbbefa SHA-1: 218d84b8c37723c636f362738db91d30fb7fc609 SHA-256: 48279518faf93498ba71b7f317d3ff4e6fe3ecd1a6527aa910f16928b0f27b96

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Numerous embedded URLs, including one pointing to a link farm on disposable hosting, suggest a phishing or malware distribution attempt. The document's structure and the presence of many external links are consistent with a tactic to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://nomylo.ru/uplcv?utm_term=action+words+beginning+with+t PDF link annotation
- http://kientrucsangtrong.com/plus/files/5912450418.pdfIn PDF document text
- https://telechips.com/ckfinder/userfiles/files/jefomitomimubisekusenib.pdfIn PDF document text
- https://marosme.ro/hirek/file/82457630877.pdfIn PDF document text
- http://the-bom.kr/upfile/files/detarukesuzex.pdfIn PDF document text
- http://www.bash.cl/media/file/24021754012.pdfIn PDF document text
- https://otterdisplay.com/userfiles/file/zazowarijeg.pdfIn PDF document text
- http://saktigroup.in/uploads/48343553519.pdfIn PDF document text
- https://fotoprint.lv/downloads/file/42475676865.pdfIn PDF document text
- https://drproperty.in/userfiles/file/1551197201.pdfIn PDF document text
- http://vipdiler.ru/files/file/82848909320.pdfIn PDF document text
- https://tvmreza.tv/ckfinder/userfiles/files/livedejirawujopori.pdfIn PDF document text
- https://laplacedesstores.com/upload/file/retuguxokunokoduruli.pdfIn PDF document text
- https://tunhuaduytan.com/upload/userfiles/files/71746640608.pdfIn PDF document text
- https://agentcctv.com/userfiles/file/25101125075.pdfIn PDF document text
- http://maility.pl/_ADRESuserfiles/file/vudinedoladag.pdfIn PDF document text
- http://xn----7sbev0bhje.xn--p1ai/images/news/file/40912007186.pdfIn PDF document text
- http://consade.com/userfiles/file/wukof.pdfIn PDF document text
- https://kawanmto.com/contents/files/zujilenozivem.pdfIn PDF document text
- http://massimosusto.eu/userfiles/files/veragiret.pdfIn PDF document text
- https://vico-immobilien.com/ckfinder/userfiles/files/xinitoselimaxidazevo.pdfIn PDF document text
- http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612eca2c64f17---29896316647.pdfIn PDF document text
- https://reclamesticker.nl/images/uploads/file/In PDF document text
- https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/9ccd9417b0f14d484d3ef9f3e4d57624/30347708508.pdfIn PDF document text
- http://uklearningnetwork.com/userfiles/file/73297834671.pdfIn PDF document text
- http://telegid.tv/userfiles/files/fenotogasaxa.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_off0000d03c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD03C	10648 bytes
SHA-256: `783d1557e9aaf63d9508f9984409e5fa2ff9d6ab7b724b8b7f05fa45c696cbf2`
`font_01_sfnt_off0000e873.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE873	17776 bytes
SHA-256: `f40fa17091b460900528bf8cef9530d7bf1edfbde858c8eb48856370b874d72d`
`font_02_sfnt_off00011663.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11663	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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