PDF malware analysis — malicious · 0c82c4c0c529c084

MALICIOUS

PDF

81.6 KB Created: 2021-09-15 00:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 19c181e78d53162959acbb56186659e3 SHA-1: 570317d3fa5b54ea2636ab788909568ec8652f43 SHA-256: 0c82c4c0c529c08433e8bb819ee07db7f1fc7dd7bbe57ec237ae588b6cc7d705

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on domains that appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the user's browser or PDF reader.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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 http://tycoonmedical.com/userfiles/file/60637146308.pdf In PDF document text
- http://naturpix.ch/cmsimages/file/53792713321.pdfIn PDF document text
- https://sporyolu.com/resimler/files/55429585675.pdfIn PDF document text
- https://osiindia.org/ckfinder/userfiles/files/84778309621.pdfIn PDF document text
- http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/29505051995.pdfIn PDF document text
- http://originalcheck.it/public/img_admin/file///vitugunizuxepupipa.pdfIn PDF document text
- https://mimpiindah168.com/contents/files/74055632537.pdfIn PDF document text
- https://mallncart.com/userfiles/files/71861663432.pdfIn PDF document text
- http://chapelguild.com/images/usr/zobonotujone.pdfIn PDF document text
- https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/85179045905.pdfIn PDF document text
- http://scro.ru/pic/file/nufojawit.pdfIn PDF document text
- http://bioaec.com/userfiles/files/tasenes.pdfIn PDF document text
- https://lawtutors.co.uk/js/ckfinder/userfiles/files/99355496253.pdfIn PDF document text
- http://mpu-beratung-brendle.de/userfiles/file/93522387803.pdfIn PDF document text
- http://marjoleintje.nl/include/userfiles/75038773012.pdfIn PDF document text
- http://barsugo.com/ckfinder/userfiles/files/soxebadizabisivukez.pdfIn PDF document text
- https://tavcam.com/upload/ckfinder/files/losedupixo.pdfIn PDF document text
- http://vetportonaccio.it/userfiles/files/46280265034.pdfIn PDF document text
- https://regaluxiluminacion.com/uploads/assets/file/nokoruvamukexepu.pdfIn PDF document text
- http://thainightjob.com/ckfinder/userfiles/files/nujutilef.pdfIn PDF document text
- http://shengnabei.com/uploadfile/file///2021091219173046.pdfIn PDF document text
- https://rajatotogroup4.com/contents/files/goxesorewoxasawagadaruza.pdfIn PDF document text
- https://portugaliaimagyarok.com/ckfinder/userfiles/files/80749364108.pdfIn PDF document text
- https://appchecar.com/ckfinder/userfiles/files/66603744415.pdfIn PDF document text
- https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/15dc381313d2a2141c591f778f6a65af/puvavuvotavopesimu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=animal+farm+book+free+readPDF 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_off0000db8d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB8D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f3a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3A4	10460 bytes
SHA-256: `8e280ef65090e32e6c78d608e83fa1b2b7dbc56a76cf0dfefb136173405ddd74`
`font_02_sfnt_off00010b49.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B49	17480 bytes
SHA-256: `a95a465972c2d23599d34cc1071c92580fd6583c71459ecb12fdd0204bdd9cb4`

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