PDF malware analysis — malicious · 8cc55180f132c4ca

MALICIOUS

PDF

76.5 KB Created: 2021-09-12 05:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: c1532f1df6508003311162743742091e SHA-1: 031216a0ad7c3b963e655b7ba6077a05a37fef6f SHA-256: 8cc55180f132c4ca0b2cba5ccd614e5b5138dc8ddf99cc46403317d8255e960f

134 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains, indicating a likely attempt to redirect users to malicious content or download further payloads. The presence of embedded JavaScript (T1059.007) is a strong indicator of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9963

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 http://educaholistica.com/resources/img/imagesck/files/famipufexofuluketa.pdf In PDF document text
- https://tortugafilms.ca/adminfiles/file/20190469185.pdfIn PDF document text
- https://bawwabatrizq.com/userfiles/file/davozesimalimodinolafa.pdfIn PDF document text
- http://righetti-ticozzi.it/userfiles/files/24090440951.pdfIn PDF document text
- http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/furizuximigimifaju.pdfIn PDF document text
- http://risorsaterra.it/userfiles/files/97225505125.pdfIn PDF document text
- http://debandhelder.nl/ckfinder/userfiles/files/93958685072.pdfIn PDF document text
- http://ohana1bbq.com/uploads/files/70479379701.pdfIn PDF document text
- http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a99f6de89c---40569856124.pdfIn PDF document text
- http://parikshitconstruction.com/uploads/xokedudew.pdfIn PDF document text
- http://kag.fr/userfiles/file/nutukefirimiwevi.pdfIn PDF document text
- https://mimpiindah168.com/contents/files/fobokigisina.pdfIn PDF document text
- http://greenworx.eu/images/uploads/files/64622172899.pdfIn PDF document text
- https://jeanmarcrobion.fr/userfiles/file/jenibonimonifekesugi.pdfIn PDF document text
- https://gestionarival.com/userfiles/file/16627685167.pdfIn PDF document text
- http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16131f231432f7---vukon.pdfIn PDF document text
- http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210910212309739436cnue3v.pdfIn PDF document text
- https://rcvizovice.cz/ckfinder/userfiles/files/wifanadano.pdfIn PDF document text
- http://www.anieliasfx.com/uploads/textareas/file/ratip.pdfIn PDF document text
- http://klimagra.pl/images/wysiwyg_img/file/paxofojadobatorel.pdfIn PDF document text
- http://www.dean-cpa.com/files/adminpic/file/81429946576.pdfIn PDF document text
- http://salamino.pl/userfiles/file/40406395424.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+record+call+in+android+11PDF 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_off0000c94d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC94D	10324 bytes
SHA-256: `00b79b8506ea73b8de9dbe93e213fc0bb856c1c5edb29617795e1645102ba4f9`
`font_01_sfnt_off0000e0b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0B4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f8c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8C6	17048 bytes
SHA-256: `e59951497426bea69efa5e369b44f3f125a5f420a185dcb14f72047957ccaadb`

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