PDF malware analysis — malicious · deea75d0fad84507

MALICIOUS

PDF

72.9 KB Created: 2021-09-25 13:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 266a8e7173e004589e3d24bfbff0d912 SHA-1: 3645d0e22ddad18c7df31bf07de1664d0d325442 SHA-256: deea75d0fad845079d3155b16f2b42ce0f4a190480b09e2b6359999dffd84fa6

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to initiate malicious actions or redirect users to malicious sites. The high number of external links, many pointing to PDF files on different domains, suggests a link farm or a phishing lure designed to obscure the true malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

Heuristics 6

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.
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://sieseam.org/userfiles/files/ninefikemunuvese.pdf In PDF document text
- http://ecogestval.com/userfiles/file/virokir.pdfIn PDF document text
- https://cytokin.ca/upload/editor/file/gefadaxanimikobasubegizen.pdfIn PDF document text
- https://alpinashop.rudy-ra.com/files/13819523067.pdfIn PDF document text
- http://ambvetesopo.eu/userfiles/files/julutejamuwiwamup.pdfIn PDF document text
- http://wienbildarchiv.com/upload_files/files/53471910370.pdfIn PDF document text
- https://borgopitti.it/userfiles/file/tasesusuzoxekitobodudexu.pdfIn PDF document text
- https://mackbeks.com/files/file/81203491074.pdfIn PDF document text
- https://ipkameros.lt/userfiles/file/kakuvafelaxokeganep.pdfIn PDF document text
- http://palestraarkadia.it/userfiles/files/fojigewakatitubetivede.pdfIn PDF document text
- https://strings97.hu/userfiles/file/96613158208.pdfIn PDF document text
- http://altus.pl/userfiles/file/9496141209.pdfIn PDF document text
- http://gaongonmaiphuong.vn/webroot/img/files/29836386193.pdfIn PDF document text
- http://xn-----elcksuhhemsi4e.xn--p1ai/files/files/45515439427.pdfIn PDF document text
- http://labellebeaute.com.hk/ckfinder/userfiles/files/75755812657.pdfIn PDF document text
- http://e-park.es/img/uploads/files/fupufovefivosegonu.pdfIn PDF document text
- https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/mi0rqevln6mpme7bbdf3219i35/kazexosepilojit.pdfIn PDF document text
- https://fullmagicweekend.com/ckfinder/userfiles/files/51497972055.pdfIn PDF document text
- http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/zinekotasoboxuxanereval.pdfIn PDF document text
- http://evo-models.com/uploads/userfiles/files/delodajok.pdfIn PDF document text
- https://vas-vill.hu/userfiles/file/tosowixekeja.pdfIn PDF document text
- http://bandenplaats.nl/cmsimages/file/52305793055.pdfIn PDF document text
- http://pretaporter-pegah.com/userfiles/file/lofububa.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=android+device+monitor+file+explorerPDF link annotation
- 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b10d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB10D	2476 bytes
SHA-256: `9e66068f7408fdcf011ef1eb05c90253355693887616f61eba9e63f900eaa60a`
`font_01_sfnt_off0000bbe3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBBE3	10600 bytes
SHA-256: `8f41e11df1886293661937e78209512452494248477e665b21da69e260738bfd`
`font_02_sfnt_off0000d415.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD415	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off0000ec27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC27	16036 bytes
SHA-256: `8f7c81afef9f7435b960761d9d88e7b9d7d2c98b209e52cb925341500d651fdb`

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