PDF malware analysis — malicious · 27274083afce270b

MALICIOUS

PDF

76.3 KB Created: 2021-09-12 02:44:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: efd2c4e21f2f5faa0ed3449d2dd9f8a0 SHA-1: 38041fc971f456af122814ccaf1149f39535291d SHA-256: 27274083afce270baf731a528175eb622c557a1a6ec4c2d2acab7f49185a5212

134 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious payloads or redirecting users to malicious websites. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution. The embedded JavaScript is the primary mechanism for achieving this, likely by downloading and executing a second-stage payload from one of the extracted URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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 https://eyescare.vn/app/webroot/upload/ckfinder/files/mifidiviwiza.pdf In PDF document text
- https://weilaimachinery.com/userfiles/files/vavolafokuradoberegewon.pdfIn PDF document text
- http://dichvutheapec.com/upload/FCK/file/zenekugoxivano.pdfIn PDF document text
- https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/bopilatepatotomoposi.pdfIn PDF document text
- https://funke.be/data/file/fubitijavexokapejumidet.pdfIn PDF document text
- http://autofactory-jin.com/js/upload/files/92889081774.pdfIn PDF document text
- https://emenu.hu/editor_up/21338773808.pdfIn PDF document text
- https://sanipro.ma/app/webroot/uploaderfiles/sixisiri.pdfIn PDF document text
- http://cpbnatation.fr/fckeditor/userfiles/file/43296829013.pdfIn PDF document text
- https://biothiennam.com/media/ftp/file/molefupifiselinorixi.pdfIn PDF document text
- http://jujucuisine.com/userfiles/file/48758899646.pdfIn PDF document text
- http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c62db79d94---98241854592.pdfIn PDF document text
- https://pensiunea-escape.ro/ckfinder/userfiles/files/mofepi.pdfIn PDF document text
- http://viorina-deko.com/images/file/gibirusosijoti.pdfIn PDF document text
- https://norservis.info/files/files/vefogesufu.pdfIn PDF document text
- http://molenat-energies.fr/molenat.com/images/editor/file/zaperudiwirizegodebarar.pdfIn PDF document text
- https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/59dc7883feed0ae12e0c11ef314b6883/23836475366.pdfIn PDF document text
- http://fundacjahfg.pl/upload/file/96379095309.pdfIn PDF document text
- http://youngshiny.com/userfiles/file/1630781422.pdfIn PDF document text
- https://mbamantra.com/ci/userfiles/files/73109172554.pdfIn PDF document text
- http://giasuthienphuc.com/Images_upload/files/62051209053.pdfIn PDF document text
- http://chretkinia.pl/userfiles/file/vaditomoxoxedu.pdfIn PDF document text
- http://contextuae.com/resimler/files/bemab.pdfIn PDF document text
- http://daearesort.com/FileData/ckfinder/files/20210901_3E83AC50BEB25AF8.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=2+landline+apkPDF 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_off0000c952.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC952	16972 bytes
SHA-256: `d018b6bda684fbaed692073d263261f6d83efff5026a310a4afa121b4b78b9a0`
`font_01_sfnt_off0000f528.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF528	10012 bytes
SHA-256: `2594c330a715355a8bb57613c76c4bfe8807f9f932b2bfa7976c5f438cf78f82`
`font_02_sfnt_off00010b65.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B65	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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