PDF malware analysis — malicious · c0a5dedb8b66f19b

MALICIOUS

PDF

92.7 KB Created: 2021-03-16 04:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23

MD5: 04b3dbefe0b5895b9608a59370dab60c SHA-1: 801909dd04f1e02bd788b014627b1d7e3539a284 SHA-256: c0a5dedb8b66f19bdb72fd79e07c03fb5b0a77b507bccd282ca7604b928586c2

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. The SE_PAYMENT_REDIRECT_LURE heuristic indicates the document's content is designed to trick users into believing there are new or changed banking instructions, a common tactic in business email compromise attacks. The PDF contains numerous external URIs, including one pointing to 'soxebez.ru', which is likely part of the phishing infrastructure.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

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
Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE

Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
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.
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/strik?utm_term=their+eyes+were+watching+god+chapter+5-7+summary PDF link annotation
- http://lishop.site/bartolinitis_aguda_tratamiento2xfzz.pdfIn PDF document text
- http://lnstagramsupportinfo.com/befufabebizedefev0omun.pdfIn PDF document text
- http://deutschebank-meine.com/popusurukubepsa7.pdfIn PDF document text
- http://stnold.com/fowowafuxixoto2r7.pdfIn PDF document text
- http://susurrus.space/4132159513i27vu.pdfIn PDF document text
- http://daating19.site/1993_jeep_wrangler_manualbcw6w.pdfIn PDF document text
- http://medtechnika1.ru/polilanadomsexn.pdfIn PDF document text
- http://fakaremun.iblogger.org/how_to_use_excel_for_accounting_purposes.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://kujugomanata.rf.gd/what_are_the_disadvantages_of_online_learning.pdfIn PDF document text
- http://pakefuvusenoz.rf.gd/funawotumigiluduvek.pdfIn PDF document text
- https://s3.amazonaws.com/fezenur/mecanica_vectorial_para_ingenieros_dinamica_beer_10_edicion.pdfIn PDF document text
- https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_b8d923a9231343c7ae6a56bb0c6571e1.pdf?index=trueIn PDF document text
- http://famuruvif.epizy.com/jonakejovenibepev.pdfIn PDF document text
- https://s3.amazonaws.com/xubifupi/89442069095.pdfIn PDF document text
- https://s3.amazonaws.com/kosipefojaw/13_eyewitness_news_houston_reporters.pdfIn PDF document text
- http://fuzuxoluzetirig.rf.gd/buvajezixotizajewet.pdfIn PDF document text
- https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_4f97e9d7dac446a9b61aa3aab193c851.pdf?index=trueIn PDF document text
- http://rezumasalimod.epizy.com/58860418453.pdfIn PDF document text
- http://turegipamikum.epizy.com/pravastatina_dosis.pdfIn PDF document text
- https://s3.amazonaws.com/putelekireza/32522226816.pdfIn PDF document text
- https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_1c1a9483e30f444dadc33e8d13cb66ca.pdf?index=trueIn PDF document text
- https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_37ee59c50d984a0db4a71c87754c0fbb.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_off00011e86.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E86	5716 bytes
SHA-256: `36d5b15ef92c84a64b76bbe195960c4873bd6a9e3dfab1f26250ecba065f8a5a`
`font_01_sfnt_off000131f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x131F1	10952 bytes
SHA-256: `06df8564235d068ec127eedf36ff8be897e32f17b82f2fc64640a0eb05375bb9`
`font_02_sfnt_off0001572e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1572E	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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