PDF malware analysis — malicious · a3ba8a8ad2bfee32

MALICIOUS

PDF

76.6 KB Created: 2021-03-28 00:23:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c77072c321ebaa9b33c47e25ced96d03 SHA-1: 5fec7bfc4b7ec672519f5a5d7019ce79b8a1fa44 SHA-256: a3ba8a8ad2bfee320f3abad8a66468600fce93bf4812e131623d4a731c5ddbbd

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a malicious payload or visiting a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious resource.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://soxebez.ru/123?utm_term=devexpress+report+designer+custom+datasource
- http://nextauto02.ru/siberian_tiger_facts_endangeredofl81.pdf
- https://cdn-cms.f-static.net/uploads/4417123/normal_604219e344149.pdf
- http://qrastenmap.online/clasificacin_de_funciones_ejemplosj5k5e.pdf
- https://cdn-cms.f-static.net/uploads/4367281/normal_603af13135df9.pdf
- https://cdn-cms.f-static.net/uploads/4487432/normal_601f1e36740c9.pdf
- http://casbah2point0.com/can_cops_get_into_snapchat7ay46.pdf
- https://static.s123-cdn-static.com/uploads/4416810/normal_5fc61a028d8b4.pdf
- http://uscovidcharts.com/solajezonopusadiribe0sa0h.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/kofabube/axios_post_data_formdata.pdf
- https://s3.amazonaws.com/gotijejaj/julenebam.pdf
- https://s3.amazonaws.com/turip/nudikefagetigu.pdf
- https://s3.amazonaws.com/defipedibe/how_many_babies_does_a_komodo_dragon_have.pdf
- http://lowuguja.myartsonline.com/8942287110.pdf
- https://s3.amazonaws.com/zobuwubedak/88786495257.pdf
- https://s3.amazonaws.com/gumagabu/sateziresovanonozokulug.pdf
- https://s3.amazonaws.com/voxipanovigepiv/53143566299.pdf
- http://futikuzita.onlinewebshop.net/jupijajusobazinuvanoxa.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000db7f.bin` `5a48d63f694f8ccf142dfe178b75dee1b579b3526f787b36b38110394e2fb587`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB7F	4772 bytes
`font_01_sfnt_off0000ec36.bin` `52eadf3c2ce551107e8e164cd6a13ae014a59ffc69830bc7afa00d0b9c775db5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC36	5488 bytes
`font_02_sfnt_off0000feda.bin` `ddcc0f829c95971bd23ec45448783b3814bac849bbf95790741a382cbc92e52b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEDA	11136 bytes

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