PDF malware analysis — malicious · 65663d9c49bf89f1

MALICIOUS

PDF

78.9 KB Created: 2021-09-17 10:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 4d7bd9e1b8db3a27b0753895cfe7c4dc SHA-1: 823c75d44b506d4263fc77bd335c984b262570de SHA-256: 65663d9c49bf89f1c64a1b48e35b770c91c6ea44bd5e71d0de76a8903e99b835

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous external URIs, including one pointing to 'pixomot.ru'. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer, likely to redirect the user to malicious websites or download further payloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links to disposable domains, reinforcing the phishing or spamming nature of the document.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

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://pixomot.ru/uplcv?utm_term=dragon+ball+season+8+episode+2 PDF link annotation
- http://neodentpetrosino.it/userfiles/files/74677432244.pdfIn PDF document text
- https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/a0c7f2a08406d3079f73829df98c0573/77660109811.pdfIn PDF document text
- http://www.aragonemprendedor.com/userfiles/files/labenipelujajawozupam.pdfIn PDF document text
- http://nissanotogovap.net/uploads/images/files/86759429503.pdfIn PDF document text
- http://all-vehicle.net/js/upload/files/notamen.pdfIn PDF document text
- http://itineraire-consulting.com/ckfinder/userfiles/files/63027931473.pdfIn PDF document text
- https://oferta.lt/i/File/1366537249.pdfIn PDF document text
- http://thehedgerowchronicles.com/ckfinder/userfiles/files/57590211567.pdfIn PDF document text
- http://hiroshima-teishaku.com/userfiles/file/pegewuwosarasenasalogomat.pdfIn PDF document text
- http://sjmhospital.org/files/js/ckfinder/userfiles/files/81455474820.pdfIn PDF document text
- http://bc-arman.kz/ckfinder/userfiles/files/21612066145.pdfIn PDF document text
- http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/38149825968.pdfIn PDF document text
- http://dulichtantai.com/files/uploaded/files/87733776312.pdfIn PDF document text
- http://www.boldino-hotel.com/ckfinder/userfiles/files/72699121840.pdfIn PDF document text
- http://nickelsgrafikdesign.de/ckfinder/userfiles/files/85910182585.pdfIn PDF document text
- https://bitree.com/ckfinder/userfiles/files/13619756818.pdfIn PDF document text
- https://ckmandarin.com/uploads/samurarire.pdfIn PDF document text
- http://medwin.kr/userData/board/file/wekagedukevapavebad.pdfIn PDF document text
- http://wsp.pl/userfiles/file/tojazesozixatubi.pdfIn PDF document text
- http://bpsstudio.hu/uploads/88408828805.pdfIn PDF document text
- https://ceylanotel.com/firma/files/1532218904.pdfIn PDF document text
- https://voziky-paletove.cz/mctree.cz/pictures/other/files/36344750711.pdfIn PDF document text
- http://microcement.ua/userfiles/file/21088549261.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_off0000c5db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC5DB	20852 bytes
SHA-256: `217194bf2c70ae1e671493f5c3d59b512b1c00358f0699022b882f410c59bdce`
`font_01_sfnt_off0000fc8c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC8C	10936 bytes
SHA-256: `422c47e87ea4d9359c773bd2a4f8c397dfb141d5dbb5a85e975fd59d2ed9a6f6`
`font_02_sfnt_off00011590.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11590	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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