PDF malware analysis — malicious · 458634ede15957b1

MALICIOUS

PDF

72.6 KB Created: 2021-03-19 08:35:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30

MD5: a38e168428d05218ebb848ba74652fb7 SHA-1: 5d140c08a37315b7c2a34f3706a5c7e91193ab3c SHA-256: 458634ede15957b156b3b57cbd98396204a8c262a64041e9ea5b4e26fbe3f1be

214 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to drive traffic to potentially malicious content. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

Nyx PDF Classifier malicious score 0.9988

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://dafemum.ru/award?keyword=nutrici%25C3%25B3n+parenteral+pediatrica+pdf In PDF document text
- https://jevokave.weebly.com/uploads/1/3/4/2/134266272/runulagu_dulezuna_viluja.pdfIn PDF document text
- http://sevoxotedeki.medianewsonline.com/bis_711.pdfIn PDF document text
- https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/badiduvelo-vagixida-lugepozez-zanipi.pdfIn PDF document text
- http://jinosewifuwefe.22web.org/whatsapp_onto_macbook_air.pdfIn PDF document text
- https://linasiwafeki.weebly.com/uploads/1/3/1/3/131380288/kunudiwipadew_rulusegoxo.pdfIn PDF document text
- http://xuroriwonufuz.scienceontheweb.net/35905438701.pdfIn PDF document text
- https://zulujiporanaru.weebly.com/uploads/1/3/4/5/134590758/wesimewiv.pdfIn PDF document text
- http://kusipanos.iblogger.org/83509170618.pdfIn PDF document text
- http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/gavexilatuvitaz/sudulatusenurubewuluvefiz.pdfIn PDF document text
- https://1fd079ea-3156-4ae8-a0b4-6153e0b529c5.filesusr.com/ugd/e66bf7_b1ea6e12a9da4a488fed7020cd5cea1c.pdf?index=trueIn PDF document text
- http://femagela.myartsonline.com/fitness_anywhere_manuals.pdfIn PDF document text
- https://s3.amazonaws.com/mijumomub/corning_ware_coffee_maker_parts.pdfIn PDF document text
- https://s3.amazonaws.com/waduzirader/ladasumizejupik.pdfIn PDF document text
- https://s3.amazonaws.com/daxemo/liwiwakulode.pdfIn PDF document text
- http://kimufigekufeta.rf.gd/8931558044.pdfIn PDF document text
- https://s3.amazonaws.com/senodiw/thesis_defense_ppt_template_free.pdfIn PDF document text
- https://s3.amazonaws.com/zedudo/mokadowavupidogopozusuwas.pdfIn PDF document text
- https://s3.amazonaws.com/bokexizometun/federal_reserve_reporting_forms.pdfIn PDF document text
- https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_a5cb013a7af54f49b5a096f565dc81be.pdf?index=trueIn PDF document text
- http://josisokapiziwi.rf.gd/82693198721.pdfIn PDF document text
- https://f19d2187-ce67-4d04-8798-eef694565169.filesusr.com/ugd/bd4746_dabecddd63d14c8089945e42a4786830.pdf?index=trueIn PDF document text
- http://bivojeda.atwebpages.com/how_to_start_a_comic_script.pdfIn PDF document text
- https://s3.amazonaws.com/vobuturinivi/web_templates_bootstrap_dashboard.pdfIn PDF document text
- https://21e22d26-41c4-45db-adc1-f279a95720e3.filesusr.com/ugd/9b7d8a_b4bbb36babfb4b08911146cd12135ce5.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d151.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD151	2192 bytes
SHA-256: `04050aafa401b5cc0821be438424824fc156ade133e4a3348db5809f20cba6ae`
`font_01_sfnt_off0000db37.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB37	5076 bytes
SHA-256: `e1c9214009dd3402c1ea57abfb72079c7073fb46f650f65d16b91b340e09f3ac`
`font_02_sfnt_off0000ec53.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC53	11688 bytes
SHA-256: `ae2810e10273bed2b44b2108a0cc77412a8be9341b9275710eb2236c561a9012`

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