PDF malware analysis — malicious · 481b885a7cdf051d

MALICIOUS

PDF

82.5 KB Created: 2021-09-11 21:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 4cfaa6aeee470ce2718c34d38c54df9f SHA-1: 0dd88fc953f85fcc0e1f995e5386a1fa8a309ab0 SHA-256: 481b885a7cdf051d10e57f2b7f398ddf92dab4fd4223d9fc4a141f35b45ac8b9

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and multiple external URIs, suggesting it is designed to redirect users to potentially harmful websites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the idea that this PDF is part of a link farm, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9960

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://catamma.ru/uplcv?utm_term=screen+recorder+az+apk PDF link annotation
- http://rencontres-icare.org/userfiles/file/fonoxiwaxunejav.pdfIn PDF document text
- https://www.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/9721465662.pdfIn PDF document text
- http://cserepakciok.hu/xdata/file/59773809987.pdfIn PDF document text
- https://villadorottya.hu/uploads/frontend/files/42195590916.pdfIn PDF document text
- https://hainutedecopii.eu/ckfinder/userfiles/files/13766243030.pdfIn PDF document text
- http://microcement.ua/userfiles/file/51697806893.pdfIn PDF document text
- http://mueblesdepladur.es/1/userfiles/file/25169454867.pdfIn PDF document text
- http://www.gc-antey.ru/ckfinder/userfiles/files/1129413340.pdfIn PDF document text
- http://mis.nrru.ac.th/gradjournal/ckfinder/userfiles/files/vadinumoranudel.pdfIn PDF document text
- https://jatransfer.com/userfiles/file/puvuzojofuledevulumej.pdfIn PDF document text
- https://namkhoasaigon.vn/web/images/files/28124088793.pdfIn PDF document text
- http://bebelino.ru/userfiles/file/13984661291.pdfIn PDF document text
- http://mail-business.ru/uploads/file/taxifizesizoxorobafire.pdfIn PDF document text
- http://avvocatogiuliani.it/userfiles/files/fezabiwotad.pdfIn PDF document text
- https://ibeguiristain.com/userfiles/files/nilotedadij.pdfIn PDF document text
- https://xulynuocphangiathinh.vn/images/pic/file/29011470991.pdfIn PDF document text
- http://optimaglobal.net/ckupload/files/beratobelilumala.pdfIn PDF document text
- https://sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/gimipurewojadaz.pdfIn PDF document text
- http://meble-tk.pl/userfiles/file/46132154178.pdfIn PDF document text
- http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161305bc890008---xebulezedipudafe.pdfIn PDF document text
- http://explosivedevices.ru/media/file/pipuxafevujodolutada.pdfIn PDF document text
- http://fourfoods.com/images/files/7556533613.pdfIn PDF document text
- http://kubkao-kubpla.com/userfiles/files/kubipitularaze.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_off0000e0f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0F7	17280 bytes
SHA-256: `a38f8907b7395905abd0e195be179beca09e82e03573d4d569a487b0da69a03b`
`font_01_sfnt_off00010da0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DA0	10328 bytes
SHA-256: `2ef340530dcf9083bffd166e81636e7c6411177fd26694a9e1df87ce2eddce18`
`font_02_sfnt_off00012513.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12513	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.