PDF malware analysis — malicious · 07bca7d805da669a

MALICIOUS

PDF

82.3 KB Created: 2021-09-13 22:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 8a782753093a5bd105cc3f8c303b05b1 SHA-1: b5c81dcbd2693e7d6e3c0cd807c4ea66c8184ab1 SHA-256: 07bca7d805da669a0fdd15b2337d565a3d98d540864ad1bf0f971e9636de6acb

174 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The sample is a PDF file flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and PRC/3D content, indicating a potential exploit or payload delivery mechanism. Several external URIs were extracted, some of which are hosted on potentially disposable domains, suggesting a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

Heuristics 7

PRC/3D content in PDF high CVE related PDF_PRC_3D

PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
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://topupdana.com/contents/files/zetubusejiwamubijulosake.pdf In PDF document text
- http://concilianavarra.com/userfiles/files/zovupelido.pdfIn PDF document text
- http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16136face7db7b---nirigifafutolinitof.pdfIn PDF document text
- https://bharatceramics.in/ckfinder/userfiles/files/rebivalufuzekodo.pdfIn PDF document text
- https://hometutorsdelhi.com/userfiles/files/81953261255.pdfIn PDF document text
- http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/dekijek.pdfIn PDF document text
- http://geoplan.su/userfiles/file/jedavukinigu.pdfIn PDF document text
- https://kalashad.com/userfiles/file/80588452713.pdfIn PDF document text
- http://icloudcleaners.com/uploads/account/autoresponderfiles/mipafixefimadodavelukis.pdfIn PDF document text
- http://rayhovietnam.vn/upload/files/30903275741.pdfIn PDF document text
- https://synodradomski.pl/userfiles/file/nagipimofarokigugivojus.pdfIn PDF document text
- http://boldogelet.hu/media/96452092202.pdfIn PDF document text
- http://cana.vn/uploads/userfiles/file/6264289870.pdfIn PDF document text
- http://cmtdental.com/upload/ckimg/files/gativowemobonenutiv.pdfIn PDF document text
- https://riminabda.sk/userfiles/file/vekoxazegowerazoma.pdfIn PDF document text
- https://dbjadow.pl/attachments/file/41495502393.pdfIn PDF document text
- https://lean-ds.com/upload/editor/file/nixutugar.pdfIn PDF document text
- http://www.jobsincrete.gr/images/_user_na/file/89369814570.pdfIn PDF document text
- https://cityface.cz/res/file/33096280879.pdfIn PDF document text
- http://ohmamakitchen.com/uploads/files/gijojadilo.pdfIn PDF document text
- https://nhahangbienhaitien.com/uploads/files/5463163076.pdfIn PDF document text
- http://dejede.com/userfiles/file/12462330540.pdfIn PDF document text
- http://park-seversk.ru/other/js/ckfinder/userfiles/files/58574225437.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=sd+card+issues+androidPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000de81.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE81	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f693.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF693	17608 bytes
SHA-256: `9dee12091f6759a06e1e5cc62e19b9a3c4733338fffc42facf6f9bf7846522de`
`font_02_sfnt_off00012445.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12445	10392 bytes
SHA-256: `79cfdf22225fda86121fc0e9d12fe0316f3f00d318300da56bc9a91b84f2bd16`

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